Background
He was born in Santiago, Chile, the sixth of 15 children of Juan Francisco Larraín Rojas and of Mercedes Gandarillas Aránguiz.
He was born in Santiago, Chile, the sixth of 15 children of Juan Francisco Larraín Rojas and of Mercedes Gandarillas Aránguiz.
He studied at the prestigious Instituto Nacional, in Santiago and from there he went to the Santiago Seminary. In 1844 he graduated in Theology and Law.
After a long discernment, he decided to embrace the ecclesiastical career. Before entering the priesthood, the young Joaquín had written several impassioned articles dealing with apologetics and other religious subjects, in catholic magazines. Larraín Gandarillas was of Basque descent.
After having fulfilled all the necessary stages, he was ordained as a priest and celebrated his first mass in the Church of the Company (Santiago) on April 4, 1847.
His priesthood and subsequent episcopate were characterized by the untiring energy and initiative that he applied on all his missions and in the exercise of his ministry. He lived in the United States. for some time, where he took part in the Plenary Council of North America as a delegate of the bishop of Richmond.
In 1853 he was appointed Rector of the Santiago Seminary. In 1877 he was appointed auxiliary bishop of the Santiago archdiocese.
He was the first president ("rector") of the Pontifical Catholic University of Chile, which was founded June 21, 1888 through a decree issued by the Santiago Archbishopric.
During his parliamentary tenure he was vocal in manifesting his strong religious convictions. He left parliament, in 1867. Monsignor Joaquín Larraín Gandarillas died in Santiago in 1897, at the age of 75.
One year earlier, Larraín Gandarillas had become a member of the Faculty of Theology of the University of Chile. In 1864 Larraín Gandarillas was elected as a member of parliament (diputado) for the (now extinct) electoral district of Rere, near Concepción.