Blocul Rotund — the Round Block — is a circular residential tower in the Lujerului neighbourhood of Bucharest, one of the most visually distinctive pieces of communist-era housing in the city. Its cylindrical form sets it apart from the rectangular panel-block housing that defines most of Bucharest's communist-era residential districts, making it a landmark in a neighbourhood that otherwise follows the standard geometry of socialist mass housing.
The circular plan is a pragmatic architectural choice that also produces an unusual social geometry: the apartments arranged around the circumference all receive a mix of exposures, the building has no back or front, and the communal vertical circulation is concentrated at the centre. In the flat, sprawling landscape of Bucharest's western suburbs, the Blocul Rotund functions as an orientation point — a disc of concrete that you can use to locate yourself in a grid of otherwise interchangeable blocks. That it was built as ordinary housing, with no more budget or ambition than its rectangular neighbours, makes its persistence as a local landmark all the more telling.