The Church of Saints Martin and Sebastian of the Swiss (Italian: Santi Martino e Sebastiano degli Svizzeri) is a Roman Catholic oratory in Vatican City.

The church was built by Pope Pius V in 1568 to serve as a private chapel for the Pontifical Swiss Guards, whose barracks are located next to Porta San Pellegrino, close to the Apostolic Palace.

Until the 1648 Peace of Westphalia, the German-speaking Swiss Guards gathered in the church of Santa Maria della Pietà in Campo Santo Teutonico, where there was a side altar reserved for them.

[5][6][7] The classical façade consists of four large Doric columns supporting an entablature, but the inscription "Pius V P.M." mentioned by Forcella has disappeared.

[10][11] The frescoes were renovated in the years 1727–1728 by Carlo Roncelli and were finally removed in 1967 for conservation purposes and stored in the Vatican Museums.