Keret House was designed by Jakub Szczesny of Warsaw-based studio Centrala, it is the world's narrowest house. Keret House is fully functional space in which one can live as well as create. The House is located on the plot measuring 92 centimeters in its narrowest point and 152 centimeters in its widest point. It is located between buildings at Chlodna 22 Street and Zelazna 74 Street. The house itself is 72 centimeters in the narrowest and 122 centimeters in the widest point.