GIOVANNI XX, POPE. - A non-existent pope due to the duplication of the pontificate of JOHN XIV. Cf. the critical note by A. Mercati on the series of popes, in Annuario Pontificio 1950, p. 14; V. GIOVANNI XV, pope.
Enciclopedia Cattolica
Enciclopedia Cattolica
GIOVANNI XX, POPE. - A non-existent pope due to the duplication of the pontificate of JOHN XIV. Cf. the critical note by A. Mercati on the series of popes, in Annuario Pontificio 1950, p. 14; V. GIOVANNI XV, pope.