Every year, thousands of people descend on a small town in the English countryside to watch a two-day game of mass street football that could easily be mistaken for a riot.

This ancient form of football has a rule forbidding players from murdering each other.Every year, thousands of people descend on a small town in the English countryside to watch a two-day game of mass ...

In the 826-year-old Atherstone Ball Game, there are two rules, locals say: Keep the big leather ball on the main street, and don’t kill anyone.

See 11 of the week’s most interesting images from around the world, as selected by Washington Post photo editors.