Today marks the quincentenary of John Calvin’s birth. Over at the First Things site, I take the occasion to pay special attention to Calvin’s concern for articulating the antiquity, and therefore the catholicity, of the Reformation. Among the factors that converts from Protestantism to Roman Catholicism very often cite as major influences on their move is the novelty of the former compared with the antiquity of the latter. This is, undoubtedly, an important point that ought to be addressed by concerned Protestants. But I argue, in continuity with the Reformers, I think, that this concern is best answered in the...