At the siege of Milan by the Lombard Alboin, the Bishop Honoratus (568) sought refuge in Genoa, with a great number of his clergy, which returned to Milan only 70 years later under John the Good. In the 10th-century, the archbishops of Milan became feudatory of the Emperor extending his jurisdiction to all North-West Italy. The most distinguished of these was Ariberto da Intimiano (1018–45). As the power of the burghers grew, that of the archbishops waned, and with it the imperial authority which the prelate represented, and since the 12th century Milan became a Guelph town who fought the Emperor. The archbishop Ottone Visconti in the 13th-century caused himself to be proclaimed perpetual lord, thus putting an end to the Republic of Milan and establishing the power of the House of Visconti who ruled the Duchy of Milan from 1277 to 1447. The figure who marked the modern history of the church of Milan was Charles Borromeo, archbishop of Milan from 1564 to 1584, who was a leading figure during the Counter-Reformation and was responsible for significant reforms in the Catholic Church. His pastoral efforts were followed also by his successors, such as Federico Borromeo (died 1631) and Giuseppe Pozzobonelli (died 1783). In the 20th century, two Cardinal Archbishops of Milan were elected to the papacy: in 1922, Cardinal Achille Ratti was elected as Pope Pius XI, and in 1963 Cardinal Giovanni Battista Montini was elected as Pope Paul VI. The church of Milan was governed from 1979 to 2002 by Cardinal Carlo Maria Martini, who had been a favorite of the Catholic left. Present leadership As of 7 July 2017, the current Metropolitan Archbishop of Milan is Archbishop Mario Enrico Delpini, who has been serving since his appointment by Pope Francis, having served previously as the Vicar-General and the Auxiliary Bishop of Milan. Delpini had succeeded the retiring Cardinal Angelo Scola, who had been in office since 2011 and had been a possible papabile. Archbishop Delpini is assisted by four Auxiliary Bishops: Erminio De Scalzi, Luigi Stucchi, Franco Agnesi, and Paolo Martinelli. The resignations of Stucchi and De Scalzi were accepted by Pope Francis on 30 April 2020. That same day, he appointed Giovanni Raimondi and Giuseppe Vegezzi as auxiliary bishops. Seminaries The Seminary of the archdiocese has the principal see in Venegono Inferiore. The minor seminary were located in Seveso. Bishops and archbishops A list of the