In the Caetani Archive in Rome, there is a draft of a letter addressed to Cardinal Gabriele Paleotti, dated September 22nd, 1581, the author of which has been identified as the Bolognese bishop Alessandro Casali. The subject of the letter is the decorating project designed by the latter for his chapel in the Cathedral of Sant’Ambrogio di Vigevano, but of notable interest is the mention of Domenico Tibaldi, Paleotti’s trusted architect, who Casali involved in some projects probably destined for the same city. The letter provides us with new information about Tibaldi’s clients during the last stage of his career, including the Duke of Savoy Charles Emmanuel I, as well his previously unknown connection with Bishop Casali, which merits further study.
