The Church of the Nativity, or Basilica of the Nativity, is a basilica located in Bethlehem in the West Bank, Palestine. The grotto it contains holds a prominent religious significance to Christians of various denominations as the birthplace of Jesus. The grotto is the oldest site continuously used as a place of worship in Christianity, and the basilica is the oldest major church in the Holy Land.

The church was originally commissioned by Constantine the Great a short time after his mother Helena's visit to Jerusalem and Bethlehem in 325–326, on the site that was traditionally considered to be the birthplace of Jesus.
The holy site known as the Nativity Grotto is thought to be the cave in which Jesus was born. In 135, Emperor Hadrian had the site above the grotto converted into a worship place for Adonis, the mortal lover of Aphrodite, the Greek goddess of beauty and desire. Jerome claimed in 420 that the grotto had been consecrated to the worship of Adonis, and that a sacred grove was planted there in order to completely wipe out the memory of Jesus from the world