Complex sentence: In 1348, he was a student of theology in Paris, in 1356, he received his doctorate and in the same year he became grand master ("grand-maître") of the College of Navarre.
Split into simpler sentences: In 1348, he was a student of theology in Paris. In 1356, he received his doctorate and in the same year he became grand master ("grand-maître") of the College of Navarre.