Charles Emmanuel III of Sardinia
Before the creation of the diocese, the largest church in the city was the Collegiate Church of S. Maria del Bosco, presided over by a Chapter, consisting of three dignities and fifteen Canons. The church, whose existence is attested as far back as 1446, was severely damaged in the siege of 1744, and was rebuilt through the generosity of King Charles Emmanuel III of Sardinia. The Chapter was suppressed by the papal bull of 1817.