Castritian was Bishop of Milan in mid 3rd-century. He is honoured as a Saint

Saint

A saint is a holy person. In various religions, saints are people who are believed to have exceptional holiness.In Christian usage, "saint" refers to any believer who is "in Christ", and in whom Christ dwells, whether in heaven or in earth...

 in the Catholic Church and his feast day is on December 1.

Life

Almost nothing is known about the life and the episcopate of Castritian, except that he was bishop of Milan in mid 3rd-century, and that his corpse was allegedly buried in a cemetery in the area of Porta Romana

Porta Romana (Milan)

Porta Romana is a former city gate of Milan, Italy. In its present form, the gate dates back to the 16th century Spanish walls of Milan; its origins, anyway, can be traced further back to the Roman walls of the city, which had a corresponding "Roman Gate" roughly in the same area.The name "Porta...

 not far from the present Basilica of Saint Calimerius

Basilica di San Calimero

The Basilica di San Calimero is a church in Milan, northern Italy. Its name refers to Saint Calimerius , an early bishop of the city...

. His relics were later translated

Translation (relics)

In Christianity, the translation of relics is the removal of holy objects from one locality to another ; usually only the movement of the remains of the saint's body would be treated so formally, with secondary relics such as items of clothing treated with less ceremony...

 into the church of San Giovanni in Conca

San Giovanni in Conca

San Giovanni in Conca is a crypt of a former basilica church in Milan, northern Italy. It is now located in the centre of Piazza Missori.-History:...

, which was demolished between the 19th and 20th century.

Middle age texts, such as the Historia Dataria dated 11th-century, add biographic details which are to be considered legendary. Among these legendary traditions, is the length of his episcopate (41 years), the start of his reign shortly after the Emperor Domitian

Domitian

Domitian was Roman Emperor from 81 to 96. Domitian was the third and last emperor of the Flavian dynasty.Domitian's youth and early career were largely spent in the shadow of his brother Titus, who gained military renown during the First Jewish-Roman War...

 in 97 and the consequent date of death in 138. Also legendary is his consecration as church of a house donated by a certain Philips, even if modern scholars, supported by 4th-century documents, deem as likely the early existence of a house church

House church

House church, or "home church", is used to describe an independent assembly of Christians who gather in a home. Sometimes this occurs because the group is small, and a home is the most appropriate place to gather, as in the beginning phase of the British New Church Movement...

 with a garden in a area between Porta Ticinese

Porta Ticinese

Porta Ticinese is a former city gate of Milan, Italy. The gate, facing south-west, was first created with the Spanish walls of the city, in the 16th century, but the original structure was later demolished and replaced in the early 19th century...

 and Porta Magenta

Porta Magenta

Porta Magenta, formerly known as Porta Vercellina, was one of the city gates of Milan, Italy. The gate was established in the 9th century, with the Roman walls of the city; it was moved with the medieval and Spanish walls, and was finally demolished in the 19th century...

.