Piazza San Marco is filled with many of Venice treasures, even more Venice tourists, and sometimes even high tides! For a Venice apartment rental in the very core of Venice, look no further than a Venice holiday rental near Piazza San Marco, or St. Mark's Square. The frenetic tourist days in summer are all part of the experience, with the Byzantine mosaic of St. Mark's Basilica looming over the piazza filled with holiday makers.