He was the secret chamberlain and minister of memorials of two popes in the second half of the 16th century, Pius V, later made a saint, who rewarded him for his services by granting him the abbey of Santa Maria di Castelbaldo on lease and the title of counts of Monte Cerno for his descendants, and Sixtus V, who appointed him, among other things, tutor to his nephew, Cardinal Alessandrino. Between the 16th century and the end of the 19th century, he collected, and his family after him, many correspondences, prints, parchments, passports, and various documents, more or less relevant. These documents were finally ordered by Abbot Francesco Fiorenzi, in the last quarter of the 18th century, into a historical archive, composed of bound volumes, parchments and other historical finds of the family and the town of Osimo. In particular, the archive is enriched with over 150 parchments – the oldest of which dating back to 1270, up to the most recent ones in the late 18th century – and with the seals of Monsignor Teodosio, who later became bishop of Osimo in 1588, and of other abbots of the family.

He was appointed bishop of Osimo in 1588, a position he held until his death in 1591. Entrusted by the Pope with the task of following up on the rules and dictates of the Catholic counter-reformation, of which Pius V was a strong supporter, he brought the practice of traditional religious canons back to the diocese. He carried out improvements in the cathedral of San Leopardo, including the opening of the portal onto Piazza dell’Episcopio and the translation of the remains of Osimo Holy Martyrs into the crypt.

On the front of the family palace there stand three stone coats of arms, commissioned by the community in 1588 on the occasion of the election of Monsignor Teodosio Fiorenzi as Bishop of Osimo: the arms of Bishop Fiorenzi, in the center, the arms of Saint Pius V on the left and the arms of Sixtus V on the right.

Historian Fanciulli wrote of Bishop Teodosio: “We believe another quality of Fiorenzi was a certain laudable commitment to properly administering his offices, wanting to be informed of everything by his ministers; a concern to preserve his jurisdiction; good manners which he always used towards his fellow citizens; and above all, fervor, firmness, and constancy in promoting and defending his reasons”.

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