Church of the Nativity (Bethlehem)

Built in 339 AD, birthplace of Jesus Christ

Saint Peter's Basilica (Vatican City)

Original built in 4th century, major Christian site

Etchmiadzin Cathedral (Armenia)

Constructed in 301 AD, oldest state-built church

Santa Maria in Trastevere (Rome)

Founded 4th century, early Christian basilica

Church of Saint Simeon Stylites (Syria)

Built in 5th century, ancient pilgrimage site

Dura-Europos Church (Syria)

3rd-century house church, early Christian worship site

Saint George's Church (Ethiopia)

12th century rock-hewn church, UNESCO World Heritage site

Saint Sergius and Bacchus (Turkey)

Built in 527 AD, inspired Hagia Sophia

Basilica of San Lorenzo (Milan)

Built in 4th century, ancient Roman influence

Cathedral of Trier (Germany)

Built in 4th century, oldest cathedral in Germany

Saint John Lateran (Rome)

Founded in 324 AD, papal seat before Vatican

Church of Saint Mary (Turkey)

Built in 3rd century, located in Ephesus

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