10 Bagatela Street in Warsaw, Tenement house in Śródmieście, Poland

The building at 10 Bagatela Street is a multi-story residential structure with decorative facade elements and regularly spaced windows typical of early 1900s construction. Its form and details represent common features of Warsaw's residential buildings from that era.

The six-storey tenement was built in 1911–1912 to a design by Józef Napoleon Czerwiński and Wacław Heppen, whose names appear on the front wall. Krzysztof Kamil Baczyński was born here in 1921 and lived in the building until 1936; a plaque unveiled in 1981 commemorates him. A renovation in 1989 destroyed part of the rich Art Nouveau floral ornament, and that same year the building was entered in the register of monuments.

The building reflects residential life from the early 1900s, showing how multiple families shared one structure with shared staircases and courtyards. Its decorated facade and window patterns reveal the craftsmanship of Warsaw's urban workers.

The building stands at 10 Bagatela Street, not on a corner, so approach it from the Bagatela side to see the facade with its two bay windows and the oculus-topped gable. It is a protected monument and a working tenement, so only the exterior and the gate passage can be seen; the three-winged wooden gate is two storeys high.

The only plaque on the facade commemorates Krzysztof Kamil Baczyński, the poet born in the building in 1921 and living there until 1936; it was unveiled in 1981. Look also for the inscription naming architects Józef Napoleon Czerwiński and Wacław Heppen on the front wall.