Background: Beginning in the 18th century, the situation changed from more or less active persecution of religious services to a state of restricted toleration of other religions, as long as their services took place secretly in private churches.
Question: Religious services for other religions were tolerated as long as they adhered to what rule?
Answer:<extra_id_0>.
<extra_id_0> as long as their services took place secretly in private churches<extra_id_1>