The Church of the Nativity is one of the holiest sites in Christian tradition, which holds that the church was built on top of the cave where Jesus of Nazareth was born. The church was first built under the auspices of the Roman emperor Constantine the Great in 135 AD and has been refurbished and added to numerous times since. Inside the church, you can visit the Milk Grotto, which is said to be the actual cave where Mary gave birth to Jesus.
The church is a popular tourist destination year-round and the site of a particularly festive celebration on Christmas, when masses of people from all over the world gather inside and outside the church for services that are shown on a large screen in Manger Square.
The site is also holy to Muslims, who consider Jesus one of the prophets of Allah, and is a UNESCO World Heritage Site.
