Elvira Madigan is the nickname of Mozart's "Piano Concerto No. 21 in C major," which he wrote in 1785 within a space of 4 weeks. It is one of Mozart's most popular piano concertos, and has three movements.
The concerto was penned for a series of Lenten subscription concerts given by Mozart in 1785. However, it was actually premiered at Mozart's benefit concert at the National Court Theater on March 10 of that year. A handbill for the concert announced that it would include "a new, just finished Forte piano Concerto."
The slow second movement is the best known part of this piece thanks to its use in Elvira Madigan, a 1967 Swedish film about a tragic tightrope walker, which gave the concerto its name.
The second movement's title is "Andante in F major." "Andante" refers to the tempo marking, which in this instance means to be performed at a moderately slow speed. "Andante" is Italian for "a walking pace."