The five largest religions — Islam, Buddhism, Christianity, Judaism, and Hinduism — represent about 77%of the world's population.
Every year, billions come together to celebrate their faith.
Here are some of the most powerful moments captured in photos in 2017:
Hindu priests sit inside a cave as they perform evening prayers on the banks of the river Ganges in Devprayag, India.
A 93-year old Holocaust survivor celebrates the anniversary of his bar mitzvah ceremony in Haifa, Israel.
Artists dressed as Hindu gods Rama and Laxman act as fireworks explode during Vijaya Dashmi, or Dussehra festival celebrations in Chandigarh, India.
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