Largely modelled on this style, also, are the circular Baptisteries of Italy and the round churches of England, France and Germany, the modern Russian churches and all the Mohammedan mosques.
"Our Homeland Churches and How to Study Them"
Sidney Heath
In the first centuries of the Christian era it was customary for the ceremony of baptism to be performed in buildings known as Baptisteries, apart from, but close to, cathedrals and important parish churches.
"Architecture"
Nancy R E Meugens Bell