After a period at the University of Göttingen, de Brún was appointed professor of mathematics at St. Patrick's College, Maynooth, in 1914. In April 1945, he was elected by the Senate of the National University of Ireland to succeed John Hynes as President of University College, Galway, an office he held until his retirement in 1959. His friend Thomas MacGreevy referred to de Brún as, "Rector Magnificus", and praised his, "Olympian capacity to appreciate the most exalted works of art and literature, ancient and modern."[1]
The School of Mathematics, Mathematical Physics and Statistics is based in Áras de Brún, a building named in his honour. He subsequently became Chairman of the Arts Council of Ireland, a position he held until his death in 1960. He also served as chairman of the Council of the Dublin Institute for Advanced Studies.[citation needed]
The French Government awarded de Brún the title of Chevalier of the Legion d'Honneur in 1949, and in 1956, the order Al Merito della Repubblica Italiana was conferred on him by the President of Italy. He was created a domestic prelate (a Monsignor) by the Pope in 1950.[citation needed]
De Brún bought land at Dún Chaoin in the Dingle PeninsulaGaeltacht. In the 1920s, he also built a house there known as (Irish: Tigh na Cille), where his sister and her children would often visit and stay at length.[4] Through de Brún's literary mentorship of his niece, the future poet Máire Mhac an tSaoi, he has been credited with having an enormous influence upon the future development of Modern literature in Irish.
^ abcd Edited by Louis de Paor (2014), An paróiste míorúilteach / The Miraculois Parish: Selected Poems by Máire Mhac an tSaoi, Wake Forest University Press. p. 18.