Ein Offizier zu Pferde in Rückenansicht 

Theodor Roos's "Ein Offizier zu Pferde in Rückenansicht" is a drawing depicting an officer on horseback, seen from behind. The officer, adorned in elaborate attire, holds the reins of his horse, which is depicted with great detail. Roos, a Dutch artist known for his animal studies, captures the anatomy of the horse with precision, making this drawing a valuable study for future equestrian paintings. This work can be found at the Städel Museum.