Waterlooplein is a square in the centre of Amsterdam in the Netherlands, near the Amstel river. The daily flea market on the square is popular with tourists. The Stopera city hall and opera building and the Mozes en Aäronkerk church are at Waterlooplein. Waterlooplein was created in 1882 when the Leprozengracht and Houtgracht canals were filled in. The square is named after the Battle of Waterloo in 1815. The square became a marketplace when the city government decided that the Jewish merchants in the nearby Jodenbreestraat and Sint Antoniebreestraat had to move their stalls to the square. The Waterlooplein became a daily market (except on Saturdays, the Jewish sabbath) in 1893.