 The French army of King Napoleon I of Italy (Emperor Napoleon I of France) occupied Bagnoregio in 1810, and abolished the diocese of Bagnoregio on 12 August 1810, handing it over to the diocese of Montefiascone.This uncanonical act was never approved by Pope Pius VII, who was a prisoner of Napoleon at Fontainebleau until 1814.The cathedral in civitas Bagnoregio was dedicated to Saint Donatus.