Last Saturday was Christmas Day, the day set aside by Christian faithful to celebrate the birth of Jesus Christ in Bethlehem over 2,000 years ago. Christianity remains the largest religion in the world, with over 2 billion adherents across the globe. Christmas is celebrated in many ways by those followers, and even more ways by those who enjoy the larger, more secular traditions surrounding the modern holiday. Collected here are some glimpses of this year's Christmas observations and celebrations around the world.