Alvar Aalto's original Stool 60, designed in 1933, is a true icon amongst design enthusiasts. The simple design with three L-shaped legs fits in nearly any interior. The stool is easily stackable, making it handy to have extra seating at hand for (un)expected visitors. For the seating, a variety of versions are available.
Artek Stool 60 is also available with 4 legs (E60 stool) and in a children's version (NE60) at Designcollectors.