(b. 1823, Amsterdam, d. 1887, Ixelles)
Belgian architect and urban planner, son of Tilman-François Suys. Léon Suys was the author, in 1865, of the plans to cover and divert the Senne (Zenne) river in Brussels, a defining event in the history of the city. As part of this, he designed the modern courses of Brussels' central boulevards, and several monumental public buildings related to the project, including the Brussels Stock Exchange, the Great Central Halls (demolished in 1956), and the reconstruction of the Greater Sluice Gate at the south of the city. He also designed the buildings of the thermal baths in Spa, Belgium, built between 1862 and 1868.