Chiesa di San Pietro in Borgo, Medieval church in Borgo, Rome, Italy

Chiesa di San Pietro in Borgo is a medieval church located near Porta Cavalleggeri adjacent to Vatican City territory in Rome. The interior contains 15th-century frescoes and a 16th-century panel depicting the Madonna with Child.

The church was built in the 11th century and later became a subsidiary of St. Peter's Basilica. Medieval papal documents confirm its connection to the larger basilica.

The church served as a stopping point for French pilgrims traveling to Saint Peter's Basilica. This location held special meaning for visitors from France who came to venerate the tomb.

The oratory stands on Piazza del Sant'Uffizio beside Porta Cavalleggeri, within the extraterritorial zone granted to the Holy See, so it is reached on foot from the Vatican area rather than as a parish stop. It is now part of the Palazzo del Sant'Uffizio complex, restored as an oratory in 1923, and no regular public visiting is documented in the sources.

The church is also recorded as San Salvatore in terrione, a name Christian Hülsen linked to a district called Terrione outside Porta Cavalleggeri rather than to the towers of the Leonine City. Hülsen also warned against confusing it with the chapel of S. Salvatoris in ossibus at the slaughterhouse, whose ruins survive in the Campo Santo dei Teutonici e dei Fiamminghi.