Nicolaus of Luxemburg (* 1322 in Prague; † July 30, 1358 in Belluno) was Patriarch of Aquileia from 1350 until 1358. He was the illegitimate son of King Johann of Bohemia. His mother’s name is not passed on. On August 2, 1342, Pope Clemens VI proclaimed him provost of the Diocese Prague, following King Johann’s wish. On July 20 of the same year, pope Nicolaus had granted him canonicate and benefices of Vyšehrad. In 1345, he personally delivered a message of King Johann of Bohemia to Clemens VI. In a document from 1348 Nicolaus calls himself dean of the church of Olmütz and royal chancellor.