Please understand, the military officers in the photo are GERMAN, not Austrian, even those with the plumes, which were worn in full dress with many pickelhaubes. The uniforms appear to be field grey in color, not pre-war dark blue, etc., which leads me to believe this was a wartime, or even post war (1920's) funeral.
Again, the clergy in the foreground are Protestant, not Catholic. Most Austrians are Catholic. NOT an Austrian funeral.