Piano Concerto No.18, KV 456

For years, historical speculation was that Mozart had written this concerto for Maria Theresa von Paradis, based on a letter written around that time by Leopold Mozart to his daughter Nannerl. However, Hermann Ullrich has discounted this theory, based on the date of entry in Mozart's catalogue and the fact that von Paradis had left Paris at the start of October 1784, which indicated that there was not sufficient time to send von Paradis the concerto for performance. Richard Maunder has countered with the idea that Mozart could still have sent the concerto to Paris, and that it would have been forwarded to von Paradis in London, where it was possible that she performed the work in March 1785.