Origins of Christmas

When was Christmas first celebrated? How did December 25 become the date for the feast? How did the Bible’s “magi from the East” become three kings named Melchior, Caspar, and Balthasar who rode camels from three different continents to worship the newborn Christ? How did the Feast of the Nativity generate an entire liturgical season from Advent to Candlemas? Why did medieval and Renaissance artis...