Final answer:
The Lacrimosa sequence from Mozart's Requiem, K. 626, was composed in 1791. Information about an artwork titled 'Requiem pour une feuille morte' is irrelevant to the musical piece by Mozart.
Step-by-step explanation:
The Lacrimosa sequence from Wolfgang Amadeus Mozart's Requiem in D minor, K. 626, was composed in 1791. Mozart's Requiem is a significant piece of classical music and the Lacrimosa is one of its most famous movements.
Despite being unfinished at the time of Mozart's death in December 1791, it was later completed by Franz Xaver Süssmayr, who was a student of Mozart. The provided information about the artwork titled Requiem pour une feuille morte does not pertain to the Requiem by Mozart, which is a musical composition, not a physical artwork containing wooden circles, wheels, metal parts, or any form of assembly.