D major
In the Baroque period, D major was seen as "the key of glory"; so many trumpet pieces were in D major. Examples include concertos by Fasch, Gross, Molter (No. 2), Leopold Mozart, Telemann (No. 2), and Giuseppe Torelli; sonatas by Corelli, Franceschini, Purcell, Torelli; and "The Trumpet Shall Sound" and the "Hallelujah" chorus from Handel's Messiah.