Perhaps the most striking of the legal differences between France and Alsace-Moselle is the absence in Alsace-Moselle of a separation of church and state, even though a constitutional right of freedom of religion is guaranteed by the French government. Alsace-Moselle is still governed by a pre-1905 law established by the Concordat of 1801 which provides for the public subsidy of the Roman Catholic Church, the Lutheran Church, the Calvinist Church and the Jєωιѕн religion, as well as providing for public education in these faiths; although parents are allowed to refuse religious education for their children. The clergy for these religions are paid for by the state. Catholic bishops are named by the President of the French Republic following proposal by the Pope. The public University of Strasbourg has courses in theology and is famous for its teaching of Protestant theology.

This situation is unusual in a country like France where church and state are more strictly separated than in most other nations. There is debate over whether the second largest religion in France, Islam, should enjoy comparable status with the four official religions.[2]

SOURCE:Wikipedia

Well, this is pretty much the same as in the Federal Republic of Germany as well as Austria, for what ever it's worth...

PS: Obviously it could be worth a lot under better circuмstances and the separation of Church and state is surely an evil, but in the Germanies, and I am sure it is the same in Alsace, Catholic religion classes in public schools, in the last decades now seldom taught by priests or religious (not that this would be much better, presently), have hardly anything to do with Catholicism anymore, and the Church spends the huge amount of taxes received into oblivion, senseless and often uncatholic enterprises.