The Scuola Grande di San Marco is a building in Venice, Italy, designed by the well-known Venetian architects Pietro Lombardo, Mauro Codussi, and Bartolomeo Bon. It was originally the home to one of the Scuole Grandi of Venice, or six major confraternities, but is now the city's hospital. It faces the Campo Santi Giovanni e Paolo, one of the largest squares in the city.