Souvenirs de Munich is a quadrille on themes from Wagner's Tristan and Isolde, for piano, four hands by Emmanuel Chabrier.
Chabrier's interest in Wagner dated from 1862, when as a study exercise he copied out the score of Tannhäuser.
[1] In early 1880 he requested time off from his ministry job to visit Munich that March with Duparc and other friends to go to a performance of Tristan und Isolde as it could only be seen there.
Chabrier regularly improvised works of this kind at the piano; Delage describes an evening dinner at the home of Lamoureux where an improvisation on themes from The Ring enraged von Bülow.
[1] Poulenc described Souvenirs de Munich as "irresistibly funny", where Wagner's principal themes appear with "false beards and fake moustaches".