The hymn "O du fröhliche" is a must in every german christmas service. A few years ago I found this arrangement that includes a introduction, a setting for 3 stanzas and the Toccata as a direct following "sortie" (usually "O du fröhliche" is the last song, even after benediction).
Due to the fact that it's a Salut à Widor I choose the extended Cavaillé-Coll organ.