Muslims, Jews, Christians: women all over the world cover their heads out of religious piety. An exhibition at Berlin's Jewish Museum asks what motivates them – and how others respond. By Nadine WojcikMore
For Muslims all around the world, Ramadan begins on 27 May. The period of fasting that always takes place during the ninth month of the Islamic lunar calendar is one of the five pillars of Islam, intended to be a time for contemplation, mediation and moderation.