His masterpiece is the equestrian statue of Charlemagne at the base of the Scala Regia on the entrance to the Vatican Palace, which sits opposite Bernini's equestrian Constantine. His works can also be found in Orvieto Cathedral and in the Basilica of Superga in Turin.
The celebrated sculptor's most famous work is a horse statue of Charlemagne located at the base of the Scala Regia on the Vatican Palace entrance, directly across from Bernini's equestrian Constantine. The artist's other notable works can be seen in Orvieto Cathedral and the Basilica of Superga in Turin.