Paimio Sanatorium is a former tuberculosis sanatorium in Paimio, Southwest Finland, designed by Finnish architect Alvar Aalto. Aalto received the design commission having won the architectural competition for the project held in 1929. The building was completed in 1933, and soon after received critical acclaim both in Finland and abroad. The building served exclusively as a tuberculosis sanatorium until the early 1960s, when it was converted into a general hospital. Today the building is owned by Turku University Hospital but is not functioning as a hospital; rather, the building has functioned as private rehabilitation center for children since 2014. The sanatorium has been nominated to become a UNESCO World Heritage Site.