Bath in Siemianowice Śląskie, historic municipal bathhouse and swimming pool in Centrum, Siemianowice Śląskie, Poland

The Łaźnia Miejska, known locally as Badyhala, is a historic bathhouse building at ul. J. Śniadeckiego 11 in the Centrum district of Siemianowice Śląskie. Designed by Emil Twrdy, it opened in 1908 as a public bath for workers of the Laura steelworks. Its indoor pool was extended to 25 metres in the 1950s–70s, and the building now operates as the Pływalnia Miejska.

The bathhouse was funded by the United Royal and Laura Ironworks joint-stock company for workers of the Laura smelter, on a meadow at the end of today's Śniadeckiego Street beside the railway tracks. Emil Twrdy of Pszczelnik drew up the plans, construction was approved in May 1907, and completion was reported on 24 April 1908. The pool was lengthened to 25 m in the 1950s–70s, closing the individual baths. The city took over the closed pool in 1994 or 1995 and reopened it that October; the building and adjoining Park Hutnik entered the monument register on 17 November 1997.

Locals call the building "Badyhala". It was funded by the Vereinigte Königs- und Laurahütte joint-stock company for the workers of the Laura ironworks, later Jedność, and for years the baths served all residents of Siemianowice. The 2019 reopening coincided with the 111th anniversary of the building's handover, marked by guided tours and free entry days.

The pool stands at ul. Śniadeckiego 11 in the Centrum district, at the end of the street by the railway tracks, next to Park Hutnik. The 2019 renovation rebuilt the main entrance and adapted it for wheelchair users, and added a tensioned ceiling over the pool hall. The building is entered from Śniadeckiego; the adjoining park is part of the same protected complex.

The pool is nicknamed "Badyhala". Its 2017–2019 modernisation cost nearly 1.1 million złoty in the first stage and almost 4.2 million złoty in the second, and won the Rom-Dom prize in the 2019 "Modernizacja Roku & Budowa XXI w." contest plus a "Zabytek Zadbany" distinction in 2020.