The main primary source for the life of Senator are the writings of
Ennodius, bishop of
Pavia in early 6th-century, who describes Senator as a man of great eloquence and wit, and attributes to him commentaries to the
Prophets. Senator was born in
Settala, about 15 km east of
Milan. His ecclesiastical career was immediately linked to his spiritual guide, Saint
Abundius bishop of
Como. In summer 450 Senator, still a priest, was part of a deputation led by Abundius that took some letters of
Pope Leo the Great to
Constantinople. These letters, dated 17 June 450, were addressed to the
Emperor Theodosius II, to the Empress
Pulcheria and to the
Patriarch of Constantinople Anatolius, and were issued to denounce their support to the doctrines of
Eutyches, deemed to be heretic. The deputation returned to
Rome before June 451, and Abundius and Senator returned to Milan with papal letters to the Bishop of Milan
Eusebius. In September 451 Abundius and Senator assisted to a local
synod in Milan, attended by 18 bishops from all over northern Italy, where they gave an account of their journey to the East. The next month, the doctrines of Eutyches were formally condemned by the
Council of Chalcedon. Senator became bishop of Milan in 472. As bishop he was actively involved in spiritual and material care of the diocese. In 472 Senator founded the
Basilica of Saint Euphemia in Milan, which he dedicated to the martyr
Euphemia, and that today is dedicate to both Saint Euphemia and him. In fact Euphemia was strictly connected to the condemnation of the Eutychian doctrine, because the Council of Chalcedon was held in a church dedicated to her and a miracle by her caused the condemnation. Senator died on 29 May 475 and he was buried in the
basilica he founded. His feast day is celebrated in the
Catholic Church on 28 May because 29 May was already occupied with another memory of saints. ==Notes==