John XXI, né Petrus Juliani (ca. 1210s - May 20, 1277), a Portuguese named Pedro Hispano, was pope from 1276 until his death on May 20, 1277.
Note that the previous pope named John was Pope John XIX and there is no Pope John XX (see article for explanation)
| Preceded by: Pope Adrian V |
Pope alphabetical list - chronological list |
Succeeded by: Pope Nicholas III |