Santi Primo e Feliciano church at the site is documented since the 12th century. It belonged to a college of canons regular who in 1354, became members of the Congregation of Servants of Mary, and so remained till the 18th century. The convent was suppressed in 1810.
The original structure had three naves, but in the 15th century an additional nave was added. In the 16th century, the church was reduced to a single nave, with demolition of the prior apse. The facade was restored in 1940.
The first chapel on the right has a Virgin and child with Blessed Bertoni and St John the Baptist (1498) by Agostino da Vaprio. The superior lunette has a fresco depicting God the Father. The transept has a large canvas depicting the Martyrdom of St Lawrence by Marcantonio Pellini (1664-1760). The presbytery has two lateral frescoes depicting the Life of Saints Primo and Feliciano (1860) by Bardotti. They depict The Trial of the Saints on the left, and Martyrdom of the Saints, on the right. The first chapel on the left has a Crucifixion with St Pellegrino by Sabbadini.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.