If imitation is the sincerest form of flattery, then Artek’s organic, stackable Stool 60 is among the most admired seats in the world. Conceived in 1933 by Finnish architect Alvar Aalto, it set the dial for Nordic chic and spurred countless knock-offs.

To mark 90 years of Artek, the furniture company that Aalto founded in 1935 with his architect wife, Aino, is re-releasing key items from its historical catalogue along with limited-edition iterations of the famous stool, which it manufactures to this day.