Architect Flemming Lassen was as noted for his furnishings as he was for his buildings, and he created bedroom furniture and other pieces specifically for the inviting interiors he brought to fruition. The Danish modernist is credited by many for his role in introducing his native country to functionalism, which prioritizes practicality over excessive ornamentation in design. Lassen is widely known for his comfortable, plush vintage sofas, lounge chairs and other seating, such as the overstuffed Tired Man armchair and Mingle sofa.
Lassen's mother and father were both painters. In the early 1900s, he and his brother — architect Mogens Lassen — began to attend boarding school where they befriended Arne Jacobsen, with whom Flemming would come to share an affinity for the principles of functionalism. Jacobsen became a leading light of Scandinavian modernism — his celebrated mid-century designs include the Swan chair and the Egg chair — and he and Flemming remained close throughout their lives, maintaining a strong personal relationship as well as a professional bond as like-minded colleagues.
Lassen and Jacobsen exchanged ideas and collaborated — the former shared his friend’s holistic approach to building projects, which is evidenced by Jacobsen’s design for the SAS Royal Hotel in Copenhagen. Jacobsen’s designs for the property encompassed everything from the architecture to interiors and furnishings. Together, Lassen and Jacobsen won an award at the “Architects Building and Housing Exhibition,” which was held at the Forum in Copenhagen in 1929. The duo was recognized for its “House of the Future,” a circular structure fitted with a then-revolutionary automatic garage door opener and windows that rolled up and down with a handle — just as they would in a car. The House of the Future has influenced Danish architecture to this day.
Flemming also often collaborated with his older brother Mogens, designing buildings and furniture alike. Mogens designed all kinds of tables and seating, and worked with the likes of Jacobsen, Finn Juhl and Ole Wanscher on various projects.
Flemming Lassen created the oak-and-sheepskin Tired Man armchair for The Copenhagen Cabinetmakers’ Guild Competition in 1935. Three years later, he designed the Mingle sofa. Both seating pieces are very popular with collectors today.
Find vintage Flemming Lassen furniture on 1stDibs.
Flemming Lassen, Sofa, Fabric, Birch, Finland, 1952
By Flemming Lassen
Located in High Point, NC
A floral-printed fabric and birch sofa or settee designed by Flemming Lassen and produced by Asko, Finland, c. 1952. Vintage fabric. Reupholstery recommended. Overall Dimensions (i...
Fabric, Wood, Birch
Sofa in Ash Legs with Original Velvet Mohair Fabric by Flemming Lassen, 1940's
By Flemming Lassen
Located in Limhamn, Skåne län
Sofa in Ash Legs with Original Velvet Mohair Fabric by Flemming Lassen, 1940's Additional Information: Material: Ash legs with original velvet mohair fabric Style: Mid century, Scan...
Ash, Velvet
Vintage "Ingeborg" sofa by Flemming Lassen, Denmark, 1940s
By Flemming Lassen, Asko
Located in Stockholm, SE
Beautiful “Ingeborg” sofa by Flemming Lassen, with curvesome forms. Designed in 1940 and named after his mother, the artist Ingeborg Winding. Upholstered with caramel colored sheepsk...
Lambskin, Birch
Vintage "Ingeborg" sofa by Flemming Lassen, Denmark, 1940s
By Asko, Flemming Lassen
Located in Stockholm, SE
Beautiful “Ingeborg” sofa by Flemming Lassen, with curvesome forms. Designed in 1940 and named after his mother, the artist Ingeborg Winding. Upholstered with caramel colored sheepsk...
Lambskin, Birch
$3,659Sale Price|23% Off
Mayor Sofa Model AJ5 By Arne Jacobsen & Flemming Lassen From 1990s
By Arne Jacobsen, Flemming Lassen
Located in Lejre, DK
The Mayor sofa, model AJ5, is a beautiful and iconic piece of furniture designed by Arne Jacobsen and Flemming Lassen in 1939. The sofa is known for its ele...
Wool, Oak
Flemming Lassen Ingeborg Sofa Sheepskin Moonlight Dark Stained Oak for Audo
By Flemming Lassen, Audo
Located in New York, NY
The Ingeborg Sofa is a beautiful and expressive 2,5 pers. lounge sofa, that originally is designed in 1940 by Flemming Lassen. The charming and elegant sofa, that is named after Flem...
Sheepskin, Oak
Flemming Lassen Mingle Sofa Moonlight Sheepskin Dark Stained Oak for Audo
By Flemming Lassen, Audo
Located in New York, NY
The Mingle sofa was designed in 1935 by architect Flemming Lassen (1902-1984) and was presented at The Copenhagen Cabinetmakers’ Guild Competition in the same year. It was subsequent...
Sheepskin, Oak, Wood
Flemming Lassen Ingeborg Sofa Sheepskin Sahara Dark Stained Oak for Audo
By Audo, Flemming Lassen
Located in New York, NY
The Ingeborg Sofa is a beautiful and expressive 2,5 pers. lounge sofa, that originally is designed in 1940 by Flemming Lassen. The charming and elegant sofa, that is named after Flem...
Sheepskin, Oak
Fresh Pond Modular Sofa From The Collection by Michael Del Piero
Located in Wainscott, NY
8-piece. Upholstered modular sectional (additional pieces also available à la carte) Hardwood construction with intes webbing, down/feather wrap, self-welt....
Linen, Wood
Blue Sky Sofa with Velvet Fabric
Located in Paris, FR
Sofa blue sky with structure in solid wood and covered with blue sky velvet fabric. Feet in gold satinated metal.
Metal
$8,000
H 28 in W 79 in D 33 in
Flemming Lassen Style, Danish Mid-Century Modern, Curved Sofa, Boucle, 1940s
By Flemming Lassen
Located in Manhasset, NY
Flemming Lassen Style, Danish Cabinetmaker, Mid-Century Modern, Curved Sofa, Beige Boucle, 1940s Beautifly organic shaped Danish sofa similar to works by Flemming Lassen. This sofa ...
Bouclé
Zebra Gold Sofa in Velvet Fabric
Located in Paris, FR
Sofa Zebra gold with structure in solid wood. Upholstered and covered with high quality zebra gold velvet fabric. With silvered oval nails. Cushions in option, not included. Excep...
Velvet, Wood
Carl Malmsten Vintage Samspel Sofa in Mohair Velvet 1950s
By Carl Malmsten
Located in London, England
Carl Malmsten - Samspel Sofa, 1956 Malmsten's iconic curved sofa was designed in 1956 and produced by Swedish cabinetmakers AB Record in Bollnas. It is considered one the finest exa...
Mohair, Velvet, Beech
$14,000
H 28.5 in W 26.25 in D 30 in
1938 Flemming Lassen for Georg Kofoed Danish Lounge Chair in Original Mohair
By Georg Kofoed, Flemming Lassen
Located in Oakland, CA
Lounge chair by notable Danish architect and designer Flemming Lassen, handcrafted by cabinetmaker Georg Kofoed in 1938, Denmark. This classic piece features a button-tufted back, su...
Mohair, Oak
Flemming Lassen Settee in Beige Sheepskin, 1940s
By Jacob Kjaer, Flemming Lassen
Located in Copenhagen, DK
Flemming Lassen, settee for master cabinetmaker Jacob Kjaer, Denmark. Tapering legs in mahogany and reupholstered in beige sheepskin. The model was presented at The Copenhagen Cabinetmakers' Guild Exhibition in 1940. A matching pair of Flemming Lassen chairs...
Sheepskin, Mahogany
Danish Designer, Sofa, Fabric, Wood, Denmark, 1940s
Located in High Point, NC
A yellow floral-printed fabric and wood sofa designed and produced in Denmark, c. 1940s. Wear to wood legs consistent with age and use Vintage fabric in fair condition, ideally rep...
Fabric, Wood
Carl Malmsten Vintage Samspel Sofa in Mohair Velvet 1950s
By Carl Malmsten
Located in London, England
Carl Malmsten - Samspel Sofa, 1956 The Samspel sofa was designed in 1956 and first produced by AB Record in Bollnäs, Sweden. It is one of the finest pieces to be designed by Malmste...
Mohair, Velvet, Beech
$1,850Sale Price|65% Off
H 33.75 in W 70.5 in D 35 in
T. H. Robsjohn-Gibbings Model 1676 by Widdicomb Attributed Sofa
By Widdicomb Furniture Co., T.H. Robsjohn-Gibbings
Located in Los Angeles, CA
This stylish Mid-Century Modern three-seat sofa, attributed to model 1676 by T. H. Robsjohn-Gibbings for Widdicomb featuring a blonde wood frame and velvet upholstery. This sofa was ...
Fabric, Wood
Danish 1940s Flemming Lassen Attributed High Back Lounge Chair
By Flemming Lassen
Located in Bridgeport, CT
Beautiful Flemming Lassen attributed high back lounge chair made circa 1940. This iconic lounge chair is probably one of the most perfect high backs ever designed. Perfect statement ...
Wool, Beech
1940s Danish Mohair Sofa with Channel Back and Curved Silhouette
Located in Oakland, CA
Elegant 1940s Danish sofa features a gracefully curved form with vertical channel-back tufting, offering both sculptural presence and structured comfort. Built with exceptional craft...
Mohair
Sold
H 28.35 in W 22.45 in D 31.5 in
Pair of Mid Century Lounge Chairs in Bamboo by Flemming Lassen, 1940s
By E.V.A. Nissen & Co. 1, Flemming Lassen
Located in Lejre, DK
Pair of lounge chairs in bamboo. Designed by Flemming Lassen and Produced by E.V.A. Nissen in Denmark. Great original condition.
Bamboo
Sold
H 29.53 in W 60.24 in D 30.32 in
Flemming Lassen Ingeborg Sofa in Beech & Smooth Beige Sheepskin, Asko 1950s
By Asko, Flemming Lassen
Located in Helsinki, FI
A lovely lounge sofa by danish architect Flemming Lassen in smooth beige natural sheepskin. The sofa has the same design as the Ingeborg chair in the series (sofa and chair) which ha...
Sheepskin, Wood
Sold
H 29.53 in W 29.53 in D 31.5 in
Pair of Flemming Lassen Ingeborg Chairs in Smooth Beige Sheepskin, Asko 1950s
By Asko, Flemming Lassen
Located in Helsinki, FI
A lovely pair of Ingeborg arm chairs by danish architect Flemming Lassen in smooth beige natural sheepskin. The curvy armrests and a slightly round buttoned back give the chairs a ...
Sheepskin, Wood
Flemming Lassen Two-Seat Sofa, model Ingeborg, lambskin
By Flemming Lassen
Located in Esbjerg, DK
Flemming Lassen two-seat sofa, original upholstered with lambskin. Legs of smoked oak. Model Ingeborg, made by Audo.
Lambskin, Oak
Sold
H 30.71 in W 61.82 in D 33.47 in
Flemming Lassen Midcentury Sofa with Sheepskin Produced by Asko, 1950s
By Flemming Lassen
Located in Stockholm, SE
Very rare midcentury sofa designed by Flemming Lassen produced by Asko, Finland between 1952-1956. Fully restored and newly professionally upholstered with sheepskin. Dimensions:...
Sheepskin, Ash
Sold
H 32.29 in W 78.75 in D 24.41 in
Mayor Sofa, Model AJ5, Designed by Arne Jacobsen and Flemming Lassen
By &Tradition, Flemming Lassen, Arne Jacobsen
Located in Lejre, DK
Mayor sofa, model AJ5, designed by Arne Jacobsen and Flemming Lassen, and manufactured by &Tradition. The sofa is upholstered with light Hallingdal fabric a...
Wool
Flemming Lassen Two-Seat Sofa, "Mingle"
By By Lassen 1, Flemming Lassen
Located in Esbjerg, DK
Flemming Lassen two-seat sofa, original upholstered with textile. Legs of soap treated oak. Model Mingle, made by Lassen.
Textile
Three-Seat Sofa by Flemming Lassen, Denmark, 1940s
By Flemming Lassen
Located in Bridgeport, CT
Fantastic 1940s three-seat sofa by Flemming Lassen. A rare find and much less common than Lassen's coveted high back armchairs the sofa has a the same design cues with the rounded ar...
Beech
Flemming Lassen Daybed by Georg Kofoed in Denmark
By Flemming Lassen
Located in Limhamn, Skåne län
Rare daybed attributed to Flemming Lassen. Most likely produced in 1930s by Georg Kofoed in Denmark.
Beech