São Sebastião Square is covered with a stone mosaic called Portuguese pavement. These waves symbolize the confluence of the Negro and Solimões Rivers. The “meeting of the waters” is the start of the Lower Amazon River. This pattern was the inspiration for the famous promenade at Copacabana Beach in Rio de Janeiro. In the background is the Church of Saint Sebastian. Built in 1888, Igreja São Sebastião is the square’s namesake.