Wolfgang Amadeus Mozart's Requiem in D Minor (K. 626) was his final and most prolific work of music. Unfortunately, Mozart passed away in 1791 before he could finish the entire mass, which has lead to much controversy over how much was originally penned by Mozart and how much was later finished by his pupil, Franz Xaver Süssmayr. In 1825, a controversy erupted over the proper completion of the mass, as many felt that Süssmayr had committed several serious flaws which where foreign to Mozart's idiom. The edition heard in part tonight, penned by Robert Levin in 1991, maintained the familiar structure of Süssmayr's edition, but revised it in such a way as to make it more familiar of Mozart's earlier music. --James Huff 00:20, March 29, 2007 (EDT)