19th Century Hand-Painted Oval Porcelain Plaque featuring a Renaissance Cavalier

This is an antique 19th-century oval porcelain plaque, meticulously hand-painted with a figure of a Renaissance-style cavalier or nobleman. The subject is depicted in a full-length pose wearing vibrant cerulean blue doublet and puffed breeches with black vertical stripes, a white ruff collar, a plumed hat, and yellow/gold accents on his chest. He stands atop a checkered black-and-white tiled floor against a neutral gradient background. The plaque is encased in a deep mahogany-colored velvet-covered convex frame, which provides a high-relief, three-dimensional shadowbox effect. The item displays craftsmanship typical of the Victorian era's fascination with historical revivalism. The painting shows fine detail in the facial features and textile texture. The velvet show signs of age-appropriate attic wear with minor lint and surface flattening, while the porcelain surface appears smooth with minimal crazing. The framing construction used during the 1800s for such domestic decor often involved a wooden or plaster base under the textile. No visible maker's marks or signatures are apparent in the provided view, but the overall aesthetic suggests a European origin, likely French or German (KPM-style), given the high quality of the enamel work.