Since the end of the nineteenth century, a procession has made its way each year to the Communards' Wall. What event does this pilgrimage commemorate?

The answer

Since the 1880s, a commemorative procession has made its way each year at the end of May to the Communards' Wall to mark the anniversary of the crushing of the Paris Commune in 1871. This pilgrimage has become a ritual of the labour movement and the French left.

This question belongs to the “The Paris Commune” series of the Père-Lachaise quiz: ten questions, a story behind every right answer.