Archbasilica of Saint John Lateran"The Cathedral of the Most Holy Savior and of Saints John the Baptist and the Evangelist in the Lateran (Italian: Santissimo Salvatore e Santi Giovanni Battista ed Evangelista in Laterano), also known as the Papal Archbasilica of Saint John [in] Lateran, Saint John Lateran, or the Lateran Basilica, is the cathedral church of the Diocese of Rome in the city of Rome, and serves as the seat of the Roman Pontiff. It is the oldest and highest ranking of the four papal major basilicas, holding the unique title of "archbasilica". It is the oldest public church in the city of Rome, and the oldest basilica of the Western world. It houses the cathedra of the Roman bishop, and has the title of ecumenical mother church of the Catholic faithful." - (en.wikipedia.org 04.04.2020) Lateran