Conversation so far:
when do cadenzas usually occur in solo concertos
The cadenza normally occurs near the end of the first movement, though it can be at any point in a concerto.
what is the music definition of candenza
A cadenza is an improvised or written-out ornamental passage played or sung by a soloist or soloists, usually in a free rhythmic style, and often allowing virtuosic display.
what are the greatest examples of a candenza
Beethoven's cadenza for Mozart. Mozart's Piano Concerto No. 20 in D Minor, K. 466, was given its premiere in Vienna on 22 February 1785, with the composer at the piano.

Question: show me various renditions
Self-contained rewrite: show me various rendition of Mozart's Piano Concerto No. 20 in D Minor, K. 466 cadenzas