 Ferdinando Ughelli, without any documentary proof, claims the Diocese of Bagnorea was joined to the Diocese of Viterbo on 4 February 1449, but neglects to mention when they were reestablished as separate dioceses.At the end of the 17th century, the diocese was composed of 12 towns ("oppida") and 6 villages ("villae").In 1680, the city of Bagnoregio had approximately 1800 inhabitants.