Church and state are separated in Germany. Compulsory school prayers and compulsory attendance at religious services at state schools are against the constitution. (It is expected, though, to stand politely for the school prayer even if one does not pray along.) In 1995, it was ruled that the Christian cross was not allowed in classrooms, as it violates the religious freedom of non-Christian students. The cross is allowed if none of the pupils object, but must be removed in the event of an objection. Some German states have banned teachers from wearing headscarves.