The Endless Chair is designed by MT4 Architect, Belgium.

Information from the designer:

What is the endless chair ?
A tribute to M.C. Escher and his obsession for illusions and continuity ?
The manipulation of a classical object to express an aesthetic obsession ?
The opportunity to create an asymmetrical object with something that usually is symmetrical to enrich his sculptural shape ?
An attempt to answer an endless question : what is a chair ?

via Design Spotter