Um Mitternacht (At midnight), WAB 90, is a song composed by Anton Bruckner in 1886 on a text of Robert Prutz.

Bruckner composed the song on a text of Robert Prutz on 11 February 1886, for the Strassburger Männer-Sangverein (Men's singing association of Strasbourg).

[1][2] The work, of which the original manuscript is stored in the Österreichische Nationalbibliothek, was issued in the same year by the Strassburger Sängerhaus, and thereafter (1911) by Viktor Keldorfer (Universal Edition), together with the other setting (Um Mitternacht, WAB 89) and the other "midnight-song" Mitternacht, WAB 80.

[3] The song is using the text by Robert Prutz, which Bruckner had already used for Um Mitternacht, WAB 89.

Strophe 4 (So tönet oft das stille Läuten, bar 58) is sung by the choir.