Pope Benedict XV (Latin: Benedictus XV; Benedetto XV), born Giacomo Paolo Giovanni Battista della Chiesa (ˈdʒaːkomo ˈpaːolo dʒoˈvanni batˈtista della ˈkjɛːza; 21 November 1854 - 22 January 1922), was head of the Catholic Church from 1914 until his death in January 1922. His pontificate was largely overshadowed by World War I and its political, social, and humanitarian consequences in Europe.
Between 1846 and 1903, the Catholic Church had experienced two of its longest pontificates in history up to that point. Together Pius IX and Leo XIII ruled for a total of 57 years. In 1914, the College of Cardinals chose della Chiesa at the relatively young age of 59 at the outbreak of World War I, which he labeled "the suicide of civilized Europe". The war and its consequences were the main focus of Benedict XV. He immediately declared the neutrality of the Holy See and attempted from that perspective to mediate peace in 1916 and 1917. Both sides rejected his initiatives. German Protestants rejected any "Papal Peace" as insulting. The French politician Georges Clemenceau regarded the Vatican initiative as being anti-French. Having failed with diplomatic initiatives, Benedict XV focused on humanitarian efforts to lessen the impacts of the war, such as attending prisoners of war, the exchange of wounded soldiers and food deliveries to needy populations in Europe. After the war, he repaired the difficult relations with France, which re-established relations with the Vatican in 1921. During his pontificate, relations with Italy improved as well, as Benedict XV now permitted Catholic politicians led by Don Luigi Sturzo to participate in national Italian politics.
In 1917, Benedict XV promulgated the Code of Canon Law, which was released on 27 May, the creation of which he had prepared with Eugenio Pacelli (the future Pope Pius XII) and Pietro Gasparri during the pontificate of Pope Pius X. The new Code of Canon Law is considered to have stimulated religious life and activities throughout the Church.