Are any of Zelenka's works the subject of controversy?

A. Zelenka scholars seem to agree that Zelenka's Requiem in C minor (ZWV 45) may have been written by someone else, or at least "worked on" by someone else. This work is not mentioned in Zelenka's Inventory and there was no autograph score in Dresden. The earliest dated material (from Strahov Monastery in the Czech Republic) states "Prag 1763". The work does not resemble Zelenka's final masses. According to one scholar, Zelenka's usual painstaking precision in the strict matching of vocal phrasing and music is not in evidence in the copies that have survived. Interestingly, the Requiem in C minor appears to consist partly of another composition (Dies Irae solenne, also in C minor). This was not originally considered to be an integral part of the Requiem, although the two had presumably been used at the monastery to complement each other. The latter was written for a group of instruments to include violas, whereas there are no violas specified in the Requiem. The galant style is quite ...  more