Francis de Zulueta, FBA was the Regius Professor of Civil Law at the University of Oxford from 1919 until 1948. The son of Pedro Juan de Zulueta, a Spanish diplomat, by his wife Laura, daughter of Sir Justin Sheil, de Zulueta was educated at Beaumont College, The Oratory School and New College, Oxford, where he took Firsts in classical moderations, literae humaniores, and jurisprudence. He was elected to a prize fellowship at Merton College, Oxford, in October 1902, and won the Vinerian Scholarship the following year. He was called to the bar by Lincoln's Inn in 1904. He subsequently returned to Oxford as a fellow of New College, Oxford, and of All Souls College, Oxford. On the outbreak of World War I, de Zulueta, who regarded himself as British rather than Spanish, was naturalized a British subject, and was commissioned into the Worcestershire Regiment, reaching the rank of captain. In 1919, he was appointed Regius Professor of Civil Law at All Souls, becoming the first Roman Catholic Regius Professor since the Reformation. He was a leading Catholic figure at Oxford for many years and the first Catholic Regius Professor since the Reformation, befriending Tolkien amongst others with whom he debated the nature of good and evil prior to The Lord of the Rings. He was cousin of Cardinal Merry del Val. His son Sir Philip de Zulueta became the Foreign Office representative at 10 Downing Street, principally under Harold Macmillan, and his grandson, also Francis, is a leading investment professional in insurance in the City of London and a Knight of Malta. De Zulueta is an ancient Catholic Basque family from the Pamplona region of Northern Spain, tracing ancestry back at least 700 years and connected to a number of senior Spanish titles including the Marquis de Merry del Val and Conde de Torre Díaz. This part of the family moved to the UK in the early C19th co-founding the P&O shipping company and establishing a bank, Zulueta & Co. in the City of London. An ancestor, Pedro José de Zulueta, was in 1841 tried for slave trading in association with Pedro Blanco, but acquitted. A number of direct descendants still successfully operate in the City of London. Francis's brother Pedro was a composer of operettas, song, and waltzes.