In the Christian church, head coverings were considered a necessity in colder climates. During the Reformation, John Calvin and his colleagues wore skullcaps to ward off the cold. But would they wear these caps during a worship service or follow Paul’s prescription not to pray or prophesy with a covered head? Writes Calvin, For we should not be so hide-bound by conscientious principles as to think a teacher is doing anything wrong in wearing a skull-cap on his head, when he is speaking to the people