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Otto Eduard Pippel was a German painter.
Johann Adam Klein was a German painter and engraver.
He studied the art of engraving and painting at the Vienna Academy of Fine Arts, and painted battle scenes, carefully painting details and especially horses. Horses and animals in general are Klein's favorite subjects. In addition to Germany, he lived in Italy and Hungary, and everywhere he looked for subjects for his works, where horses are necessarily in the center of attention, whether it be battle scenes involving the military, or in a village stable on vacation.
Friedrich Carl Mayer was a German painter.
For his architectural paintings he took the motifs mostly from Nuremberg and Augsburg. He preferred to depict interiors and placed particular emphasis on strict drawing and correct representation of details with fine illumination by incident sunlight.