Skip to main content

Hanging Lamp 1960

to
60
502
170
678
390
54
28
9
9
2
1
1
1
1
1
678
672
3
1
3
664
2
433
209
114
92
76
582
216
148
106
100
667
667
667
51
48
31
15
15
Sort By
"Viscontea" Hanging Lamp by Achille Pier Giacomo Castiglioni for Flos, 1960s
By Flos, Achille Pier Giacomo Castiglioni
Located in bruxelles, BE
Metal and resin hanging lamp from the 1960s. Model: Viscontea. Height maximum with cable: 110 cm
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Metal

Set of 3 Matching Brutalist Hanging Pendant Lamps by MOE Lighting
By Moe Lighting
Located in Buffalo, NY
Set of 3 matching Brutalist hanging pendant lamps by MOE Lighting. Classic 1960s design. Fit
Category

Vintage 1960s American Brutalist Chandeliers and Pendants

Materials

Aluminum

1960s Switzerland Atomic Modern Hanging Lamp Style Robert Haussmann Swiss INTL
Located in Chula Vista, CA
For your consideration: Hanging Chandelier Pendant Lamp Made in Switzerland. Aluminum Tube
Category

Vintage 1960s Swiss Mid-Century Modern Chandeliers and Pendants

Materials

Aluminum

Mid-century space age ufo cocoon saucer hanging pendant lamp 1960s
By Achille Castiglioni
Located in Zaandam, NL
Gorgeous cocoon hanging pendant also very reminiscent of George Nelson's bubble saucer. Often
Category

Vintage 1960s German Space Age Chandeliers and Pendants

Materials

Brass

Cocoon Hanging Lamp by Achille Pier Giacomo Castiglioni for Flos, 1960s
By Flos, Achille Pier Giacomo Castiglioni
Located in bruxelles, BE
Metal and resin pendant lamp from the 1960s. Maximum height with cable: 120 cm. Good condition
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Metal

Cocoon Hanging Lamp by Achille Pier Giacomo Castiglioni for Flos, 1960s
By Flos, Achille Pier Giacomo Castiglioni
Located in bruxelles, BE
Metal and resin pendant lamp from the 1960s. Maximum height with cable: 120 cm. Good condition
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Metal

Taraxacum hanging lamp by Achille Pier Giacomo Castiglioni for Flos, 1960s
By Flos, Achille Pier Giacomo Castiglioni
Located in bruxelles, BE
Metal and resin suspension lamp designed by Achille & Pier Giacomo Castiglioni in the 1960s. Model
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Metal

Cocoon Hanging Lamp by Achille Pier Giacomo Castiglioni for Flos, 1960s
By Achille Castiglioni, Flos
Located in bruxelles, BE
age of the lamp.
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Metal

Viscontea Hanging Lamp by Achille and Pier Castiglioni for Flos, 1965s
By Achille Castiglioni
Located in Oirlo, LI
companies in the lighting sector, which began the production of cocoon lamps, destined to become refined
Category

Vintage 1960s Italian Chandeliers and Pendants

Materials

Metallic Thread

"Omega" Big white Hanging Lamp by Vico Magistretti for Artemide, 1962s
By Artemide, Vico Magistretti
Located in Milano, IT
Suspension lamp designed by Vico Magistretti for Artemide, Italy 1962. The Omega lamp is large in
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Metal

Nuvola Hanging Lamp by Achille Pier Giacomo Castiglioni for Flos, 1960s
By Flos, Achille Pier Giacomo Castiglioni
Located in bruxelles, BE
Nuvola pendant lamp by Achille & Pier Giacomo Castiglioni for Flos in the 60s. Good condition
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Metal

Taraxacum hanging lamp by Achille Pier Giacomo Castiglioni for Flos, 1960s
By Flos, Achille Pier Giacomo Castiglioni
Located in bruxelles, BE
Metal and resin suspension lamp designed by Achille & Pier Giacomo Castiglioni in the 1960s. Model
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Metal

Taraxacum hanging lamp by Achille Pier Giacomo Castiglioni for Flos, 1960s
By Flos, Achille Pier Giacomo Castiglioni
Located in bruxelles, BE
Metal and resin suspension lamp designed by Achille & Pier Giacomo Castiglioni in the 1960s. Model
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Metal

Taraxacum hanging lamp by Achille Pier Giacomo Castiglioni for Flos, 1960s
By Flos, Achille Pier Giacomo Castiglioni
Located in bruxelles, BE
Metal and resin suspension lamp designed by Achille & Pier Giacomo Castiglioni in the 1960s. Model
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Metal

"Viscontea" Hanging Lamp by Achille Pier Giacomo Castiglioni for Flos, 1960s
By Flos, Achille Pier Giacomo Castiglioni
Located in bruxelles, BE
r by Achille Castiglioni for Flos in 1960s. Good condition. Wear due to time and age of the lamp.
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Metal

"Viscontea" Hanging Lamp by Achille Pier Giacomo Castiglioni for Flos, 1960s
By Flos, Achille Pier Giacomo Castiglioni
Located in bruxelles, BE
r by Achille Castiglioni for Flos in 1960s. Good condition. Wear due to time and age of the lamp.
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Metal

Cocoon hanging lamp in the style of Achille Pier Giacomo Castiglioni, 1960s
By Achille Pier Giacomo Castiglioni
Located in bruxelles, BE
Cocoon hanging lamp in the style of Achille & Pier Giacomo Castiglioni. Very good condition. Max
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Metal

Large Nuvola Hanging Lamp by Achille Pier Giacomo Castiglioni for Flos, 1960s
By Flos, Achille Pier Giacomo Castiglioni
Located in bruxelles, BE
Large hanging lamp designed in the 60s by Achille & Pier Giacomo Castiglioni. Model: Nuvola
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Metal

Large Acrylic Hanging Lamp Guzzini Style Space Age design Gradient Brown Dome
By Harvey Guzzini
Located in San Benedetto Del Tronto, IT
character and charm. item. hanging lamp period. 1960/70s country. Italy material. acrylic, metal color
Category

Vintage 1960s Italian Space Age Chandeliers and Pendants

Materials

Metal

LS 134 Medusa Glass Hanging Lamp by Carlo Nason for Mazzega, 1960s
By Carlo Nason, Mazzega
Located in bruxelles, BE
Hanging lamp in transparent glass. Adjustable height. Wear due to time and age of the chandelier.
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Glass, Murano Glass

LS 134 Medusa Glass Hanging Lamp by Carlo Nason for Mazzega, 1960s
By Carlo Nason, Mazzega
Located in bruxelles, BE
Hanging lamp in transparent glass. Adjustable height. Wear due to time and age of the chandelier.  
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Glass, Murano Glass

Large Artemide Pallade MCM Hanging Lamp by Studio Tetrarch Italian Design Icon
By Studio Tetrarch, Artemide
Located in San Benedetto Del Tronto, IT
just as futuristic today. item. hanging lamp designer. Studio Tetrarch (Adelaide Bonati, Silvio
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Plastic

1960s Italian Mazzega Urano Glass and Chrome Hanging Lamp with Three Shades
By Mazzega
Located in London, England
1960s Italian Murano glass and polished chrome hanging lamp by Mazzega with three opaque white and
Category

Vintage 1960s Flush Mount

Materials

Metal, Chrome, Wire

Elegant Mid-Century Modern Wicker Pendant Lamp or Hanging Light, 1960s, Germany
Located in Munich, DE
Lovely Mid-Century Modern pendant lamp or hanging light. Manufactured probably in 1960s, Germany
Category

Vintage 1960s German Mid-Century Modern Chandeliers and Pendants

Materials

Wicker

"Omega" Vico Magistretti by Artemide 1960s Italian Design Glass Hanging Lamp
By Vico Magistretti, Artemide
Located in Brescia, IT
"Omega" Vico Magistretti by Artemide 1961 Milky glass and steel details Perfect condition.
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Steel

Unusual Brutal Modernist Blown Glass and Iron Hanging Pendant Lamp /MOE lighting
By Moe Light
Located in Buffalo, NY
Unusual Brutalist / Modernist Blown Glass and Iron Hanging Pendant Lamp by MOE lighting, Gold iron
Category

Vintage 1960s American Mid-Century Modern Chandeliers and Pendants

Materials

Iron

1960s Mid Century Hanging Lamp Chrome Metal Chandelier with 8 Glass Shades
Located in Mannheim, DE
Fantastic large 1960s hanging lamp. Made of chrome plated resp. white lacquered metal. 8 ball
Category

Vintage 1960s German Mid-Century Modern Chandeliers and Pendants

Materials

Metal, Brass

Four Flamed Mid-Century Modern Copper Pendant Lamp Hanging Light, 1960s, Denmark
Located in Munich, DE
Elegant Mid-Century Modern copper pendant lamp or hanging light. Four flamed. Designed and
Category

Vintage 1960s Danish Mid-Century Modern Chandeliers and Pendants

Materials

Aluminum, Copper

Two Flowerpot hanging lamps by V. Panton for Louis Poulsen, Denmark, design 1968
By Verner Panton
Located in Greding, DE
Two orange Flowerpot hanging lamps with enameled lampshades made from two interlocking hemispheres
Category

Vintage 1960s Danish Modern Chandeliers and Pendants

Materials

Metal

Brass Frame Capiz Shell Saucer Hanging Pendant Swag Lamp with Long Chain
By George Nelson
Located in Chattanooga, TN
ceiling and hangs on a 15' long chain with cord. The luxurious lamp is made from thin sheets of capiz
Category

Vintage 1960s American Mid-Century Modern Chandeliers and Pendants

Materials

Metal, Brass

Lovely Mid-Century Modern Pendant Lamp or Hanging Light by Doria Germany 1960s
By Doria Leuchten Germany
Located in Munich, DE
Lovely & highly decorative Mid-Century Modern pendant lamp or hanging light. Manufactured by Doria
Category

Vintage 1960s German Mid-Century Modern Chandeliers and Pendants

Materials

Metal

Space Age Italian Design Hanging Lamp in Yellow and White Acrylic 1960s Vintage
Located in San Benedetto Del Tronto, IT
with a sliding mechanism. Thanks to its size and extendable cable, this beautiful hanging lamp is
Category

Vintage 1960s Italian Space Age Chandeliers and Pendants

Materials

Metal

Teak, Glass and Brass Hanging Lamp by Carl Fagerlund for Orrefors, Sweden, 1960s
By Orrefors, Carl Fagerlund
Located in Stockholm, Stockholms län
Pendant lamp designed by Carl Fagerlund for Swedish glass company Orrefors during the 1960s. Square
Category

Vintage 1960s Swedish Scandinavian Modern Chandeliers and Pendants

Materials

Brass

Teak, Glass and Brass Hanging Lamp by Carl Fagerlund for Orrefors, Sweden, 1960s
By Orrefors, Carl Fagerlund
Located in Stockholm, Stockholms län
Pendant lamp designed by Carl Fagerlund for Swedish glass company Orrefors during the 1960s. Square
Category

Vintage 1960s Swedish Scandinavian Modern Chandeliers and Pendants

Materials

Brass

Large Mid-Century Teak and Sisal Cord Hanging Pendant Lamp attributed to Temde L
By Temde Leuchten
Located in Zaandam, NL
different shape. This lamp is in great vintage and original condition. There is a pulley fitted inside the
Category

Vintage 1960s Swiss Space Age Chandeliers and Pendants

Materials

Rope, Teak

Pair of Fior di Loto Hanging Lamp by Afra Tobia Scarpa for Flos, 1960s
By Afra Tobia Scarpa, Flos
Located in bruxelles, BE
Pair of brass pendants designed by Afra & Tobia Scarpa and manufactured by Flos in the 1960s. Fior di Loto model. Wear due to time and age For shipping, request us for receive the be...
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Brass

Mid-Century Modern Smoke Panel Tiered Swag Pendant Lamp
Located in New Windsor, NY
Smokey gray paneled hanging pendant lamp, circa 1960-1970. The wire frame supports multiple 3" x 6
Category

Vintage 1960s American Chandeliers and Pendants

Materials

Metal

Gaetano Sciolari for Lightolier Bronze Chandelier
By Gaetano Sciolari
Located in Phoenix, AZ
Gaetano Sciolari for Lightolier bronze hanging lamp circa mid 1960's. This phenomenal example has a
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Very special Murano glass hanging lamp, 1960
Located in Oirlo, LI
Very special Murano glass hanging lamp, 1960 The blown Murano glass has a beautiful orange and
Category

Vintage 1960s German Mid-Century Modern Chandeliers and Pendants

Materials

Metal

1 of 2 Large Danish Copper Hanging Lamps, 1960
By OTHR
Located in Rijssen, NL
This pair of beautiful copper lamps from the Danmark. A warm and used color of copper. Dimensions
Category

Vintage 1970s Danish Scandinavian Modern Chandeliers and Pendants

Materials

Copper

Midcentury Modern Organic Handcrafted Murano Glass Italian Hanging Lamp, 1960
Located in Madrid, ES
Hanging lamp with metal structure and three light points and translucent vegetal shaped Murano
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Crystal, Metal

Gaetano Sciolari Set of Four "Spiral" Chrome Hanging Pendants, Circa 1960
By Gaetano Sciolari
Located in Bainbridge, NY
Set of Four Gaetano Sciolari Chrome Spiral Hanging Lamps, 1960's. Featuring seven spiraling Chrome
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Chrome

Danish Modern Wood and Brass tone Hanging Candelabra Candleholder Lamp
Located in Wayne, NJ
Danish modern wood and brass hanging candelabra candleholder. Folds flat. The arms can be moved in
Category

Vintage 1960s Danish Mid-Century Modern Candle Lamps

Materials

Wood

1960 s Lightolier Hanging Lamp
By Lightolier
Located in Bainbridge, NY
small Mid Century interwoven painted Steel Chandelier. This origami inspired Hanging Ceiling
Category

Vintage 1960s American Mid-Century Modern Chandeliers and Pendants

Materials

Steel

Danish Teak hanging lamp of milk glass, 1960
Located in Oirlo, LI
Danish Teak hanging lamp of milk glass, 1960 Beautifully shaped Scandinavian design hanging lamp
Category

Vintage 1960s Danish Scandinavian Modern Chandeliers and Pendants

Materials

Milk Glass, Teak

J.T Kalmar hanging lamp Pulegoso Foam glass, 1960
By J.T. Kalmar
Located in Oirlo, LI
J.T Kalmar hanging lamp Pulegoso Foam glass, 1960 Heavy quality vintage hanging lamp made in the
Category

Vintage 1960s German Mid-Century Modern Chandeliers and Pendants

Materials

Glass

Hollywood Regency Hanging Lamp by Kaiser Leuchten, 1960 Germany
By Kaiser
Located in Oirlo, LI
Hollywood Regency hanging lamp by Kaiser Leuchten, 1960 Germany. Beautiful Hollywood Regency
Category

Vintage 1960s German Regency Chandeliers and Pendants

Materials

Brass

1960, Nelson and Noguchi Period Hanging Lamp
By George Nelson, Isamu Noguchi
Located in Amsterdam IJMuiden, NL
Lamp. Beautiful elegant design with a beautiful warm light when on. In good condition except for
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Plastic

Midcentury Teak and Cord Shade Hanging Lamp by Temde, circa 1960
By Temde Leuchten
Located in Hagenbach, DE
A wonderful suisse teak hanging lamp made by Temde in the 1960s. It is fascinating with its rare
Category

Vintage 1960s Mid-Century Modern Chandeliers and Pendants

Materials

Rattan, Teak

Midcentury Teak and Cord Shade Hanging Lamp by Temde, circa 1960
By Temde Leuchten
Located in Hagenbach, DE
A wonderful teak hanging lamp made in the 1960s by Temde in Switzerland. It is fascinating with its
Category

Vintage 1960s Swiss Mid-Century Modern Chandeliers and Pendants

Materials

Rattan, Teak, Plastic

Midcentury Vico Magistretti Metal Cetra Hanging Lamp Artemide Italy 1960
By Vico Magistretti, Artemide
Located in Palermo, IT
Cetra hanging lamp was designed by Vico Magistretti for Artemide in 1965. This lamp it is made of 2
Category

Vintage 1960s Italian Mid-Century Modern Chandeliers and Pendants

Materials

Metal

Midcentury Opaline Glass and Wooden Shade Hanging Lamp by Temde, circa 1960
By Temde Leuchten
Located in Hagenbach, DE
A wonderful teak hanging lamp made by Temde, Suisse in the 1960s. It is fascinating with its rare
Category

Vintage 1960s Mid-Century Modern Chandeliers and Pendants

Materials

Rattan, Teak

Large Cocoon Hanging Lamp by Münchener Werkstätten, Munich, 1960, Germany
By Münchner Werkstätten
Located in Nürnberg, Bayern
Very large (71cm in diameter) Cocoon lamp from the 1970s. Very impressive. Very nice condition
Category

Vintage 1960s German Mid-Century Modern Chandeliers and Pendants

Materials

Metal

Hanging Lamp, Vienna, circa 1960s
Located in Wien, AT
Hanging lamp, Vienna, circa 1960s Original condition Can be adjusted to the room height.
Category

Vintage 1960s Austrian Mid-Century Modern Chandeliers and Pendants

Materials

Crystal, Brass

Vintage Brutalist Hanging Lamp by Nanny Still for RAAK, circa 1960
By Nanny Still
Located in Esbjerg, DK
Pendant chandelier with pertruding bubbles that resembles the surface of the Moon. Caged in textured steel panels the bubble glass peeks out via the craters. The hexagonal shape is e...
Category

Vintage 1960s Dutch Mid-Century Modern Chandeliers and Pendants

Materials

Metal

Hanging Lotus Blossom Lamp
By Feldman Lighting Co.
Located in Malibu, CA
Circa 1960’s Italian lotus flower repoussé brass light fixture with one interior light. The fixture
Category

Vintage 1960s Mid-Century Modern Chandeliers and Pendants

Materials

Brass

Paul Secon Spider Web Hanging Lamp
By Paul Secon
Located in Oirlo, LI
A beautiful ceiling lamp from the 60s, designed for Sompex by the French designer Paul Secon. The
Category

Vintage 1960s French Mid-Century Modern Chandeliers and Pendants

Materials

Nylon, Plastic

  • 1
  • ...
Get Updated with New Arrivals
Save "Hanging Lamp 1960", and we’ll notify you when there are new listings in this category.

Hanging Lamp 1960 For Sale on 1stDibs

At 1stDibs, there are many versions of the ideal hanging lamp 1960 for your home. Frequently made of metal, glass and brass, every hanging lamp 1960 was constructed with great care. Your living room may not be complete without a hanging lamp 1960 — find older editions for sale from the 20th Century and newer versions made as recently as the 20th Century. A hanging lamp 1960 is a generally popular piece of furniture, but those created in mid-century modern, Scandinavian Modern and modern styles are sought with frequency. Flos, Achille and Pier Giacomo Castiglioni and Temde Leuchten each produced at least one beautiful hanging lamp 1960 that is worth considering.

How Much is a Hanging Lamp 1960?

Prices for a hanging lamp 1960 can differ depending upon size, time period and other attributes — at 1stDibs, they begin at $40 and can go as high as $700,000, while the average can fetch as much as $1,568.

Finding the Right Chandeliers-pendant-lights for You

Chandeliers — simple in form, inspired by candelabras and originally made of wood or iron — first made an appearance in early churches. For those wealthy enough to afford them for their homes in the medieval period, a chandelier's suspended lights likely exuded imminent danger, as lit candles served as the light source for fixtures of the era. Things have thankfully changed since then, and antique chandeliers and pendant lights are popular in many interiors today.

While gas lighting during the late 18th century represented an upgrade for chandeliers — and gas lamps would long inspire Danish architect and pioneering modernist lighting designer Poul Henningsen — it would eventually be replaced with the familiar electric lighting of today.

The key difference between a pendant light and a chandelier is that a pendant incorporates only a single bulb into its design. Don’t mistake this for simplicity, however. An Art Deco–styled homage to Sputnik from Murano glass artisans Giovanni Dalla Fina, with handcrafted decorative elements supported by a chrome frame, is just one stunning example of the elaborate engineering that can be incorporated into every component of a chandelier. (Note: there is more than one lighting fixture that shares its name with the iconic mid-century-era satellite — see Gino Sarfatti’s design too.)

Chandeliers have evolved over time, but their classic elegance has remained unchanged.

Not only will the right chandelier prove impressive in a given room, but it can also offer a certain sense of practicality. These fixtures can easily illuminate an entire space, while their elevated position prevents them from creating glare or straining one’s eyes.

Certain materials, like glass, can complement naturally lit settings without stealing the show. Brass, on the other hand, can introduce an alluring, warm glow. While LEDs have earned a bad reputation for their perceived harsh bluish lights and a loss of brightness over their life span, the right design choices can help harness their lighting potential and create the perfect mood. A careful approach to lighting can transform your room into a peaceful and cozy nook, ideal for napping, reading or working.

For midsize spaces, a wall light or sconce can pull the room together and get the lighting job done. Perforated steel rings underneath five bands of handspun aluminum support a rich diffusion of light within Alvar Aalto's Beehive pendant light, but if you’re looking to brighten a more modest room, perhaps a minimalist solution is what you’re after. The mid-century modern furniture designer Charlotte Perriand devised her CP-1 wall lamps in the 1960s, in which a repositioning of sheet-metal plates can redirect light as needed.

The versatility and variability of these lighting staples mean that, when it comes to finding something like the perfect chandelier, you’ll never be left hanging. From the natural world-inspired designs of the Art Nouveau era to the classic beauty of Paul Ferrante's fixtures, there is a style for every room.

With designs for pendant lights and chandeliers across eras, colors and materials, you’ll never run out of options to explore on 1stDibs — shop a collection today that includes antique Art Deco chandeliers, Stilnovo chandeliers, Baccarat chandeliers and more.

Questions About Hanging Lamp 1960
  • 1stDibs ExpertSeptember 28, 2021
    A hanging lamp is a light fitting that is suspended from the ceiling usually by a chain or a metal rod. They are generally used as a decorative fixture in homes, hotels and offices. Find a collection of antique and vintage hanging lamps on 1stDibs today.
  • 1stDibs ExpertApril 5, 2022
    Arc lamp is the name of a lamp that hangs over a sofa or chair. Base designs vary in size and shape but all support one or more arcing necks, each bearing a shade. Typically, arc lamps have dome shades. However, dome shades may also differ. Find a collection of arc lamps on 1stDibs.
  • 1stDibs ExpertApril 5, 2022
    To use a hanging oil lamp, remove the oil font from the base and fill it three-quarters of the way with clear lamp oil. Return the font and close the base. Twist the knob to raise the wick until it is a little less than 0.25 inches above the burner. Light with a match or lighter. After extinguishing and allowing time for cooling, trim the burned end off of the wick. You'll find a collection of hanging oil lamps on 1stDibs.