On 2 March 1714, barely three weeks before his twenty-ninth birthday, the Weimar court organist Johann Sebastian Bach received "the title of Concertmaster." Shortly before he had turned down an important organist's position in Halle; the promotion to concertmaster, granted "at his most humble request," clearly represented a quid pro quo on the part of his employer, Duke Wilhelm Ernst of Saxe-Weimar. As the principal condition of his new post Bach had the obligation "to perform new pieces every month"—in today's parlance, to produce a new cantata on a monthly basis.