Christian Worship Architecture and Environments c. 300 - 400 CE

Information on basilicas from a Yale University website
Dr. Allen S. Farber: The Early Christian Basilica

Rome

Map of early Christian sites
S. Crisogono (first church = Christian meeting hall c. 300) (sketch)
S. Sebastiano (cemetery basilica surrounded by private mausolea c. 312 - 313 CE)
Constantinian Basilica / S. Giovanni in Laterano / St. John Lateran (cathedral church of Rome c. 313 CE)
SS. Marcellino e Pietro / Mausoleum of Helena (c. 300 - 325 CE)
Old St. Peter's Basilica on the Vatican (c. 333 - 500 CE)
S. Costanza (c. 350)
Catacomb of Praetextatus: Martyrium (c. 350 - 400 CE)
Catacomb of St. Callixtus
Catacomb of Priscilla

Milan

S. Lorenzo (c. 370 CE)
Baptistery behind the Cathedral of St. Thecla (c. 380 CE)

Jerusalem

Holy Sepulchre Complex (4C CE)

Bethlehem

Church of the Nativity (4C CE)

Trier

Constantinian Basilica (c. 380 CE)

Salona, Yugoslavia

Anastasius Mausoleum (c. 305 - 310 CE)

Thessaloniki

Hagios Georgios (300s CE)

Constantinople

Church of the Holy Apostles / Mausoleum of Constantine (completed by 337 CE)

Echmiadzin (Central Armenia)

Mother Cathedral (4C CE)