Byzantine Church or Byzantine church may refer to:

• Historically, the State church of the Roman Empire
  • particularly, Eastern Orthodox Church in the Byzantine Empire
• Any church that uses the Byzantine Rite a.k.a. Greek Rite
  • the Eastern Orthodox Church
  • the 14 different Greek Catholic Churches, Eastern Catholic Churches that are using the Byzantine Rite
• Church buildings belonging to Byzantine architecture, usually built during the Byzantine Empire
  • Post-Byzantine church buildings, built during the Post-Byzantine era (16th-18th c.)
  • Modern church buildings belonging to the Byzantine Revival architecture also known as Neo-Byzantine architectural style
• Byzantine Church (Petra)