Were just one example to be given of the richness and diversity of Mozart's achievements, Concertos Nos. 23 & 24 would undoubtedly make excellent candidates. Completed almost simultaneously in Vienna in early 1786, the two concertos contrast starkly and seem to have been written years apart – or by two distinct yet connected minds of equal genius. Even more astonishing is the fact that they were written in parallel with the first masterpiece of the Da Ponte trilogy, The Marriage of Figaro, while sharing with it very few stylistic similarities.