By Lassen for 3daysofdesign

Mogens Lassen in his studio


The brothers Mogens and Flemming Lassen were born at the beginning of the 20th century. They were contemporaries and friends of Arne Jacobsen - the three were at school together - and all three went on to be architects and furniture designers becoming well-established by the early 1930s. Flemming Lassen and Jacobsen worked together to design Søllerød Town Hall and its furniture and fittings completed in 1942.

The company By Lassen was formed by younger generations of the family to continue the production of designs by Mogens and Flemming Lassen. 

For 3daysofdesign their store in Holbersgade in Copenhagen had special displays for visitors with the main level just up from the street laid out as an apartment furnished with designs from the collection and at the lower level - a few steps down from the street - Mogens Lassen’s work room and desk had been recreated with historic photographs, original possessions and early and trial versions of production pieces that are still owned by the family.

There were also architectural drawings and historic photographs of buildings designed by the Lassens - again from the family collection of archive material.

By Lassen, Holbergsgade 20, Copenhagen

desk and work space of Mogens Lassen recreated in the store with artifacts and archive drawings and historic photographs owned by the family


the work desk with a prototype of the Kubus candle holder designed by Mogens Lassen in 1962


Chair ML33 by Mogens Lassen

My Own Chair designed by Flemming Lassen


Stool ML42 from By Lassen


As one of the activities arranged at By Lassen for 3daysofdesign, Søren Lassen - the grandson of Mogens Lassen - talked about the famous ML42 three-legged wooden stool that was designed in 1942 and still produced by the company.

Visitors to the store were told about the construction of the distinctive and boldly-shaped seat and how that is finished and were then shown how the legs are fixed to the seat and how the shoulder of the housing and the top of the leg are sanded and smoothed before the oak is then treated or finished with oil.