Venantius Fortunatus
Bruckner composed it on 9 February 1892. The work, the manuscrit of which is archived at the "Österreichische Nationalbibliothek", is based on the Latin hymn "Vexilla Regis" by Venantius Fortunatus. It was first performed on Good Friday, 15 April 1892, and was published in the same year by Josef Weinberger, Vienna.