Portrait of Elizabeth Petrovna on Horseback Accompanied by a Negro Servant. Unknown painter of the second half of the 18th century Oil on canvas 75.5 x 57.5 cm This portrait was created after an original by Georg Christoph Grooth (1743). Elizabeth Petrovna is shown wearing the uniform of the Preobrazhensky Life-Guards Regiment with the Star and Band of the Order of St. Andrew.