The Church of San Giacomo, also known as St. Jacob's Church, is a Roman Catholic church located in the town of Ortisei in the Val Gardena valley of northern Italy. The church is named after St. James the Greater, one of the twelve apostles of Jesus Christ.

The church was first built in the Gothic style in the 14th century, but was later renovated and expanded in the Baroque style in the 17th century. The Baroque renovation included the addition of ornate decorations and frescoes on the walls and ceilings, as well as the installation of an impressive pipe organ.

One of the most striking features of the church is its tall bell tower, which stands at 83 meters (272 feet) and is one of the tallest in the region. Visitors can climb the tower for a stunning panoramic view of the surrounding mountains and valleys.

The interior of the church is decorated with beautiful frescoes and paintings, including a large altarpiece depicting the martyrdom of St. James. The church also houses several valuable religious relics, including a relic of the saint's right arm.