The late sixteenth century saw the "studium" at Santa Maria sopra Minerva undergo further transformation during the pontificate of Pope Gregory XIII. Aquinas, who had been canonized in 1323 by Pope John XXII, was proclaimed fifth Latin Doctor of the Church by Pius V in 1567. To honor this great doctor, in 1577 Juan Solano, former bishop of Cusco, Peru, generously funded the reorganization of the "studium" at the convent of the Minerva on the model of the College of St. Gregory at Valladolid in his native Spain. The features of this Spanish model included a fixed number of Dominican students admitted on the basis of intellectual merit, dedicated exclusively to study in virtue of numerous dispensations from other duties, and governed by an elected Rector.