Paimio Sanatorium is a historic building located in Paimio, Finland, designed by the renowned architect Alvar Aalto. Completed in 1933, it was originally built as a tuberculosis sanatorium, providing a healing environment for patients. The design emphasizes natural light and fresh air, featuring large windows and open spaces to promote recovery. The sanatorium is notable for its modernist architecture and innovative use of materials. It is considered a significant example of Aalto's work and has been recognized as a UNESCO World Heritage site. Today, it serves as a cultural landmark and is open to visitors interested in architecture and history.