The Old Wastewater Treatment Plant in Prague–Bubeneč is an important document of the history of architecture, technology and water management. It was built between 1901 and 1906 as the last link in the systematic sewer network in Prague.
 
 
It served to treat most of the wastewater of the city of Prague until 1967, when the Central Wastewater Treatment Plant was put into operation nearby on Císařský ostrov. The design of the sewage system and the technical parameters of the treatment plant were developed by Sir William Heerlein Lindley, a British-born civil engineer.