Gustav Adolf Muller-Coburg, 1828 Hildburghausen-1901 Rome, studied in Munich and Antwerp, worked as a portrait painter in Gotha, Coburg and Vienna, was appointed to Portugal in 1847 and became court painter, here: Portrait of Marie Gübel, so on stickers inscribed, vertically lower left in the cornersigned and dat. 1846, covered by framing, oil / cardboard box, laid on cardboard, color chips at the upper edge (hidden by framing), approx. 27x21cm, R.