Stational church

Station days were days of fasting in the early Christian Church, associated with a procession to certain prescribed churches in Rome, where the Mass and Vespers would be celebrated to mark important days of the liturgical year. Although other cities also had similar practices, and the fasting is no longer prescribed, the Roman churches associated with the various station days are still the object of pilgrimage and ritual, especially in the season of Lent.

Station days grew out of the early Christian practice of visiting the tombs of the martyrs and celebrating the Eucharist at those sites. By the fourth century, the practice of carrying out an itinerary to various churches of the city began to develop during the days of Lent. In those days it became a tradition for the pope to visit a church in each part of the city and celebrate Mass with the congregation.

In the early centuries, the Lenten fast lasted all day, and so towards the evening the Christians of Rome would begin to gather at a church known as the collecta ("gathering place"), where they would be joined by the assembled clergy of the city and the pope. The procession would then move through the streets to the station church, not far away. Having gathered at the daily statio ("standing place"), the pope would then celebrate a solemn Mass, and fragments of the Host were sent to the other stationes of the city in order to symbolize the unity of the city around its bishop. After the conclusion of Vespers, the day's fast was broken with a communal meal.

In the earliest form of the Lenten itinerary, only about twenty-five churches were assigned as stationes. More precisely, the statio was defined not as the church building, but the relics of the martyr whose relics were housed within. (For example, rather than "Station at the Basilica of St. Anastasia," the station was considered to be "at St. Anastasia" herself.)

In the sixth century, Pope Gregory the Great fixed the classic order of these stations, and confirmed the tradition that the more solemn festivals of the liturgical year should be marked with the standard practices: assembling at Sext, continuing in procession to the statio, celebrating the Eucharistic liturgy, and finishing with Vespers.

The practice of keeping stations continued beyond Lent into Eastertide. The stations for the Easter season proceeded in order of sanctity: from St. John Lateran, which is dedicated to Christ, the Savior, for the Easter Vigil, to St. Mary Major on Easter day, to the shrines of principal patrons of the city over the next three days: St. Peter, St. Paul, and St. Lawrence.

...
Wikipedia