Polish architect Jakub Szczesny built the world’s narrowest house, titled The Keret House, and it's 122 centimeters across at its widest point. He built it as both an art installation and functional house in Warsaw between buildings at Chlodna 22 Street and Zelazna 74 Street. It is meant to broaden the concept of impossible architecture.
Szczesny says, “We deeply believe it will become a symbol of modern Warsaw ingrained in its complicated history. The House attracts attention from media from entire world. I hope it will show the most fascinating side of Warsaw.”