Guido Tarlati

In Arezzo, two aristocratic factions contended for domination, the Verdi and the Secchi, and when the latter gained control they had their leader, Guido Tarlati, Archpriest of the Pieve of S. Maria Aretina, elected bishop in 1312.

[3] His program also included military conquest; on his funeral monument appear the names of: Lusignano, Chiusi, Fronzoli, Castel Focognano, Rondina, Bucine, Caprese, Lacerina, and Monte Sansovino.

Tarlati also expanded the territories of Arezzo, and in 1323, with the collaboration of Francesco I Ordelaffi (Ghibelline lord of Forlì), he conquered Città di Castello.

On 19 June 1325, Pope John XXII raised the commune of Cortona in the diocese of Arezzo to episcopal rank, as a reward for the fidelity of its Guelph populace.

[7] Tarlati's prestige as the leader in Tuscany of the Ghibelline party, however, was so high that German emperor Louis IV wanted to receive from him the Iron Crown.