Basilica Sancti Pauli extra muros, Rome

Basilica Sancti Pauli extra mœnia lies within the Vatican's extraterritoriality. , it was constructed outside the city's Aurelian Walls. The original basilica founded by the Roman Emperor Constantine I over the burial place of Paul of Tarsus.

See:

1. Andre Grabar, L'Âge d'or de Justinien, de la mort de Théodose à l'Islam, Paris 1966
2. https://www.vatican.va/various/basiliche/san_paolo/en/basilica/storia.htm
3. St. Paul's Tomb Unearthed in Rome- web.archive.org/web/20061213080313/http://news.nationalgeographic.com/news/2006/12/061211-saint-paul.html
4. St Paul burial place 'confirmed' - https://www.catholicnewsagency.com/news/8221/st-paul-burial-place-confirmed