With the support of musician friends in Munich and members of the artists’ colony of Dachau (Hans von Hayek, Adolf Hölzel, August Pfaltz, Hermann Stockmann) he worked to revive the local tradition of Christmas children's festivals, composing the music for a nativity play every year from 1903 to 1906.

In 1905 he produced his Die Nacht der Wunder [The Night of Wonders] based on a text by Selma Lagerlöf, with stage design and costumes by von Hayek, Pfaltz and Stockmann.

The Dachau orchestral musicians (including Adolf Hölzel) were augmented by members of the Munich court orchestra and choir.

[3] Being a subject of Kaiser Wilhelm II, Aloys Fleischmann was declared an enemy alien by the British government during the First World War and was interned on 4 January 1916, at first in Oldcastle, County Meath and from 1918 on the Isle of Man, from where he was deported to the Weimar Republic in 1919.

Aloys Fleischmann created over 500 compositions, most of them unpublished, among which are stage works, sacred and secular vocal and instrumental music and almost 100 Lieder.

A further catalogue was compiled by Andreas Pernpeintner and published on the library website of the University of Munich and on the Bavarian Musicians Lexikon Online.