Basilica of Saint Sebastian Outside the Walls

Basilica of Saint Sebastian Outside the Walls is an important religious and cultural landmark in Rome, Lazio. A historic Appian Way pilgrimage basilica above the Catacombs of San Sebastiano. The site’s historical development can be traced through institutional and architectural evidence.

A 4th-century basilica was established on the site and was historically known as Basilica Apostolorum. The present church was substantially remodeled in the early 17th century. The establishment is recorded as 4th century.

The principal construction chronology is constantinian-era origin; major Baroque rebuilding 1608–1613. Architecturally, Early Christian foundation with Baroque rebuilding. The site’s religious importance also includes a clearly identified devotional tradition.

Christian tradition associates the site with the temporary veneration of relics of Saints Peter and Paul and with the burial of Saint Sebastian in the catacombs. The apostolic-relic episode is recorded as early Christian tradition rather than independently verified here. Important observances include: Pilgrimage to the basilica and catacombs; Traditional Seven Churches route.

The site is officially recorded as Basilica di San Sebastiano fuori le Mura. Its religious administration is associated with Diocese of Rome. Visitors encounter a working sacred site as well as a monument.

Religious services and pilgrimage periods may affect access to particular spaces, and current practical information should be checked with the official institution.