Multiple modifications and renovations have been completed in the Clock Tower's history. For this renovation, Bartolomeo Ferracina was tasked with fixing the Magi carousel and the Angel. Today's visitors to the Clock Tower can see these same figures. He also made a new movement for the clock that  As payment for this work, Ferracina was given the old clock mechanism and the original astronomical dial. Image by After Canaletto [Public domain], via Wikimedia Commons