The archiepiscopal seminary of Milan is the Catholic seminary of the Archdiocese of Milan. It has three seats: in Venegono Inferiore (Varese province), Seveso (Monza e Brianza Province) and in Milan. The latter also hosts the Istituto sacerdotale Maria Immacolata, that trains priests during the first five years following ordination, and the Istituto Superiore di Scienze Religiose; other diocesan activities have taken place there. In the other two sites seminarist theology training is conducted: in Seveso I and II theology with the corso propedeutico, in Venegono from III to VI theology. History The first seminary dates to the times of Charles Borromeo, opening in 1564. Under the bishopric of Federico Borromeo the Seminary of Porta Orientale took final form. St. Charles built several locations in the diocese. From 1638 to 1784 three operated in Milan (the Seminary of Porta Orientale, the Seminary of Canonica, the Collegio Elvetico), along with four minor seminaries in Monza, Arona, Celana and Pollegio. First reform school and then the presence of Napoleon's troops radically transformed the seminary: the diocesan seminaries Celana, Collegio Elvetico, Seminary of Canonica and later Arona closed; a structure in Castello above Lecco opened instead. In 1839 that seat transferred to the Dominican convent of St. Peter Martyr in Seveso. With this step the configuration seminary route became simplified: ginnasio in Seveso, liceo in Monza and theology in Milan. In the second part of the nineteenth century a seminary for poor students opened in Monza, entrusted to Barnabite Luigi Villoresi: training became more flexible and open according to inspiration from Antonio Rosmini. The resulting clergy were visibly different from the traditional way: this led to tensions. In 1900 a seminary opened near the Duomo that took the name Seminarietto, aimed at training those who were intended for liturgical service in the cathedral. Following the apostolic visitation of abbot Alfredo Ildefonso Schuster, then Archbishop of Milan, the site of Venegono Inferiore was built with the intention to move the center of the seminary there. Construction began in 1928 and the facility was solemnly inaugurated in 1935. In the following decades, when the liceo classico and the last three years of theology were placed in Venegono, several locations were used: Seveso (medie-ginnasio), Masnago (elementari-medie), Arcore (medie), Merate (medie), Seminarietto del Duomo (ginnasio-liceo), Saronno (biennium theological and comunità propedeutica), Milano (adult vocations). In 1966 Cardinal Giovanni Colombo decided to transfer the theological faculty (built by