High Quality Content by WIKIPEDIA articles! Pope Benedict XV (Latin: Benedictus PP. XV, Italian: Benedetto XV; 21 November 1854 – 22 January 1922), born Giacomo Paolo Giovanni Battista della Chiesa, reigned as Pope from 3 September 1914 to 22 January 1922. His pontificate was largely overshadowed by World War I and its political, social and humanitarian consequences in Europe.