Inside Keret House, the narrowest home measures just 72 cm wide

Keret House in Warsaw, Poland, is a three-level structure measuring just 72 cm at its narrowest point and 122 cm at its widest. Built in an urban leftover space, it covers roughly 150 sq ft. Designed by architect Jakub Szczesny for Israeli writer Etgar Keret, it includes a kitchen, bathroom, dining area, workspace and sleeping zone. It was completed in 2012 after years of regulatory challenges.