Round Baths, Public bath in Vyborgsky District, Saint Petersburg, Russia

The Round Baths is a constructivist public bath complex on Muzhestva Square, at 29a Karbysheva Street. The circular building surrounds an open-air pool in its inner courtyard, and the pool operates year-round. Architect Alexander Nikolsky's design originally included a rooftop solarium and a glass dome over the courtyard, but the dome was omitted during construction.

A stone single-storey bathhouse by architect Pavel Suzor stood on this site from 1882. The current round baths were built between 1927 and 1930 to a design by Alexander Nikolsky, with Vladimir Galperin, Nikolai Demkov and Alexei Krestin. Closed in autumn 1941 for lack of water, fuel and electricity, they reopened in April 1942 during the Siege of Leningrad and still operate as baths.

Locals call the complex "baths-shayby" (wash-disks) after its round plan. The open-air pool in the central courtyard is used year-round, a feature of the original 1927–1930 design. The baths kept operating through the Leningrad blockade, closing in autumn 1941 and reopening in April 1942.

The facility is located on Karbysheva Street near Muzhestva Square and is accessible by public transportation. Visitors should expect traditional bathing conditions and may want to bring their own towels or bathing supplies.

The building earned its protected status due to its constructivist architecture and historical value as a modernist project. Its circular footprint was an innovative design choice for public buildings during the Soviet era.