A future World Heritage cathedral is being built in Albi, France. Her bishop builder, Bernard de Castanet, is close to realizing his ambitions spiritual and temporal, when “it started again.” Many years into the future, a historian, H. C. Lea, would point to this episode “at the close of the year 1299 the town was startled by the arrest of twenty-five of the wealthiest and most respected citizens.” The resulting Tribunal of the Inquisition convened that December so contaminated Albi that in “Last Song” Castanet’s successor...