Having been closed for restoration for many years, the restored astronomical clock is now visible. The fascinating tour of the clock mechanism (and rooftop bell) can only be visited on a guided tour, in English: Mon-Wed at 10:00 and 11:00, on other days at 14:00 and 15:00, in French Mon-Wed at 14:00 and 15:00, advance reservation required online or by phone at +39 041 5209070. A MUVE museum.