For anyone looking for accommodation near San Marco I highly recommend staying at the Royal Loft. The location is absolutely unbeatable for anyone looking to stay near the Piazza. It's quite literally a stone's throw away. Walk out the door turn left and in ten seconds you're in the Piazza. As for the host Nikita, he was very accommodating, always available for questions and really went above and beyond. I can't say enough good things about him.