This standard bearer was probably part of a medieval  pageant  or similar event held in the German city of Cöln
(Cologne) sometime in the late 19th Century. I have so far be unsuccessful in identifying the coat of arms that
appears on the standard and horse trappings. The horse itself appears to be of the stuffed variety.

Cabinet Photograph
Carl Westendorp - Photographer
Cöln 7 Comödien Strasse, Germany
c. 1890's