Kai Kristiansen Vintage Paper Knife Lounge Chairs

With a passion for math and engineering, Kai Kristiansen has created high-quality wood furniture for decades. Beginning in the 1950s, his chairs, modular shelving and other furnishings were made in the style that would become internationally renowned as Danish modern and boasted clean lines, perfected functionality and exacting craftsmanship.

Born in Denmark, Kristiansen trained in cabinetmaking before studying with Kaare Klint, often cited as the “father of modern Danish design,” at the Royal Danish Academy of Fine Arts in Copenhagen. At just 26 years old, Kristiansen opened his own studio.

Kristiansen had his mid-century breakthrough in 1956 with the Chair #42, which he made with Schou Andersen. Unlike most other chairs at the time, Chair #42’s armrests, with their wealth of radical angles, were connected to the back rather than the front legs. This unconventional flourish makes the backrest appear as though it is floating in midair above the seat.

Kristiansen’s next innovation was a modular wall system in 1957 — three years ahead of Dieter Rams’s more famous 606 Universal Shelving System. Called the Reolsystem Wall Unit, produced by SB Feldballes Møbelfabrik, it’s also known as the FM Wall Unit as FM/Fornem Møbelkunst began producing it in the 1960s.

Kristiansen would go on to work with other leading Danish furniture manufacturers such as Magnus Olesen, Fritz Hansen and Vildbjerg Møbelfabrik, designing everything from chairs and desks to sideboards and cabinets, frequently in rosewood and teak. (The latter was a sought-after wood by Scandinavian modern designers.)

While many of Kristiansen’s timeless designs remain in production, such as his Paper Knife sofa, which was reintroduced by Miyazaki Chair Factory in 2008, and his 1950s Entré collection, which was relaunched with Great Dane Furniture in 2016, others are prized as vintage mid-century pieces.

Today, Kristiansen is still at work on new furniture with an expert eye to thoughtfully functional designs that are made to last.

Find a collection of vintage Kai Kristiansen furniture on 1stDibs.

Organically shaped, clean-lined and elegantly simple are three terms that well describe vintage mid-century modern furniture. The style, which emerged primarily in the years following World War II, is characterized by pieces that were conceived and made in an energetic, optimistic spirit by creators who believed that good design was an essential part of good living.

ORIGINS OF MID-CENTURY MODERN FURNITURE DESIGN

• Emerged during the mid-20th century 
• Informed by European modernism, Bauhaus, International style, Scandinavian modernism and Frank Lloyd Wright’s architecture
• A heyday of innovation in postwar America 
• Experimentation with new ideas, new materials and new forms flourished in Scandinavia, Italy, the former Czechoslovakia and elsewhere in Europe

CHARACTERISTICS OF MID-CENTURY MODERN FURNITURE DESIGN

• Simplicity, organic forms, clean lines  
• A blend of neutral and bold Pop art colors 
• Use of natural and man-made materials — alluring woods such as teak, rosewood and oak; steel, fiberglass and molded plywood 
• Light-filled spaces with colorful upholstery 
• Glass walls and an emphasis on the outdoors 
• Promotion of functionality

MID-CENTURY MODERN FURNITURE DESIGNERS TO KNOW

• Charles and Ray Eames
• Eero Saarinen
• Milo Baughman
• Florence Knoll
• Harry Bertoia 
• Isamu Noguchi 
• George Nelson 
• Danish modernists Hans Wegner and Arne Jacobsen, whose emphasis on natural materials and craftsmanship influenced American designers and vice versa

ICONIC MID-CENTURY MODERN FURNITURE DESIGNS

• Eames lounge chair
• Nelson daybed
• Florence Knoll sofa
• Egg chair
• Womb chair
• Noguchi coffee table
• Barcelona chair

VINTAGE MID-CENTURY MODERN FURNITURE ON 1STDIBS

The mid-century modern era saw leagues of postwar American architects and designers animated by new ideas and new technology. The lean, functionalist International-style architecture of Le Corbusier and Bauhaus eminences Ludwig Mies van der Rohe and Walter Gropius had been promoted in the United States during the 1930s by Philip Johnson and others. New building techniques, such as “post-and-beam” construction, allowed the International-style schemes to be realized on a small scale in open-plan houses with long walls of glass.

Materials developed for wartime use became available for domestic goods and were incorporated into mid-century modern furniture designs. Charles and Ray Eames and Eero Saarinen, who had experimented extensively with molded plywood, eagerly embraced fiberglass for pieces such as the La Chaise and the Womb chair, respectively. 

Architect, writer and designer George Nelson created with his team shades for the Bubble lamp using a new translucent polymer skin and, as design director at Herman Miller, recruited the Eameses, Alexander Girard and others for projects at the legendary Michigan furniture manufacturer. 

Harry Bertoia and Isamu Noguchi devised chairs and tables built of wire mesh and wire struts. Materials were repurposed too: The Danish-born designer Jens Risom created a line of chairs using surplus parachute straps for webbed seats and backrests.

The Risom lounge chair was among the first pieces of furniture commissioned and produced by legendary manufacturer Knoll, a chief influencer in the rise of modern design in the United States, thanks to the work of Florence Knoll, the pioneering architect and designer who made the firm a leader in its field. The seating that Knoll created for office spaces — as well as pieces designed by Florence initially for commercial clients — soon became desirable for the home.

As the demand for casual, uncluttered furnishings grew, more mid-century furniture designers caught the spirit.

Classically oriented creators such as Edward Wormley, house designer for Dunbar Inc., offered such pieces as the sinuous Listen to Me chaise; the British expatriate T.H. Robsjohn-Gibbings switched gears, creating items such as the tiered, biomorphic Mesa table. There were Young Turks such as Paul McCobb, who designed holistic groups of sleek, blond wood furniture, and Milo Baughman, who espoused a West Coast aesthetic in minimalist teak dining tables and lushly upholstered chairs and sofas with angular steel frames.

As the collection of vintage mid-century modern chairs, dressers, coffee tables and other furniture for the living room, dining room, bedroom and elsewhere on 1stDibs demonstrates, this period saw one of the most delightful and dramatic flowerings of creativity in design history.

With entire areas of our homes reserved for “sitting rooms,” the value of quality antique and vintage seating cannot be overstated.

Fortunately, the design of side chairs, armchairs and other lounge furniture — since what were, quite literally, the early perches of our ancestors — has evolved considerably.

Among the earliest standard seating furniture were stools. Egyptian stools, for example, designed for one person with no seat back, were x-shaped and typically folded to be tucked away. These rudimentary chairs informed the design of Greek and Roman stools, all of which were a long way from Sori Yanagi's Butterfly stool or Alvar Aalto's Stool 60. In the 18th century and earlier, seats with backs and armrests were largely reserved for high nobility.

The seating of today is more inclusive but the style and placement of chairs can still make a statement. Antique desk chairs and armchairs designed in the style of Louis XV, which eventually included painted furniture and were often made of rare woods, feature prominently curved legs as well as Chinese themes and varied ornaments. Much like the thrones of fairy tales and the regency, elegant lounges crafted in the Louis XV style convey wealth and prestige. In the kitchen, the dining chair placed at the head of the table is typically reserved for the head of the household or a revered guest.

Of course, with luxurious vintage or antique furnishings, every chair can seem like the best seat in the house. Whether your preference is stretching out on a plush sofa, such as the Serpentine, designed by Vladimir Kagan, or cozying up in a vintage wingback chair, there is likely to be a comfy classic or contemporary gem for you on 1stDibs.

With respect to the latest obsessions in design, cane seating has been cropping up everywhere, from sleek armchairs to lounge chairs, while bouclé fabric, a staple of modern furniture design, can be seen in mid-century modern, Scandinavian modern and Hollywood Regency furniture styles.

Admirers of the sophisticated craftsmanship and dark woods frequently associated with mid-century modern seating can find timeless furnishings in our expansive collection of lounge chairs, dining chairs and other items — whether they’re vintage editions or alluring official reproductions of iconic designs from the likes of Hans Wegner or from Charles and Ray Eames. Shop our inventory of Egg chairs, designed in 1958 by Arne Jacobsen, the Florence Knoll lounge chair and more.

No matter your style, the collection of unique chairs, sofas and other seating on 1stDibs is surely worthy of a standing ovation.