The church of Santa Maria della Pietà or della Visitazione is a prominent church in the sestiere of Castello in Venice, Italy. It is sited on the Riva degli Schiavoni, a short walk from the Doge's Palace. The church of Santa Maria della Pietà or della Visitazione is a prominent church in the sestiere of Castello in Venice, Italy. It is sited on the Riva degli Schiavoni, a short walk from the Doge's Palace.