Santa Maria del Popolo
At the same time the basilica became a parish church when Pope Pius IV created the Parish of St. Andrew "outside Porta Flaminia" with the motu proprio "Sacri apostolatus" on 1 January 1561 and united it in perpetuity with the Augustinian priory. The care of the new parish was entrusted to the friars and Pope Pius V moved the seat of the parish to Santa Maria del Popolo. The parish still exists encompassing a large area comprising the southern part of the Flaminio district, the Pincian Hill and the northernmost part of the historic centre around Piazza del Popolo. The basilica was made a titular church on 13 April 1587 by Pope Sixtus V with the apostolic constitution "Religiosa". The first cardinal priest of the "titulus" was Cardinal Tolomeo Gallio. Pope Sixtus V also enhanced the liturgical importance of the basilica elevating it for the rank of station church in his 13 February 1586 bull which revived the ancient custom of the Stations. (This role was lost in modern times.) The same pope included the church among the Seven Pilgrim Churches of Rome instead of the inconveniently located basilica of San Sebastiano fuori le mura.
Santa Maria del Popolo
What is certain that the journey was connected to a feud between the Observant and the Conventual monasteries of the Augustinian Order in the Holy Roman Empire and their proposed union. According to the traditional dating Luther arrived in Rome between 25 December 1510 and January 1511. His biographer, Heinrich Böhmer assumed that the young observant friar stayed in the monastery of Santa Maria del Popolo. This assumption was disputed by newer biographers who argued that the tense relationship between the Lombardian Congregation and the administration of the Augustinian order made the monastery of Santa Maria del Popolo an unsuitable lodging for Luther who tried to win a favour at the leaders of his order. Be that as it may, Luther, who spent four weeks in Rome, certainly visited the only observant Augustinian monastery in the city and its famous pilgrimage church that was the favourite of the reigning pope.