Pope John XXI, born Pedro Julião, was head of the Catholic Church and ruler of the Papal States from 8 September 1276 to his death in May 1277. He is the only Portuguese pope in history. He is sometimes identified with the logician and herbalist Peter of Spain, which would make him the only pope to have been a physician.

Pope John XXI, who reigned as Roman Pontiff from 1276–1277.

1276

1277