The Sulabh International Museum of Toilets is a rare collection of objects from around the world that traces the evolution of toilets since 2500 BC. The founder and social activist, Dr Bindeshwar Pathak, conducted research and collected old toilets, archival photographs and documents from his travels around the world. The museum seeks to educate students about historical trends in the development of toilets and help sanitation experts learn from the toilet related social customs to help resolve current challenges.