Portrait painting by Johann Baptist von Lampi the Elder, LeadArt oil painting just do reproduction of them in museum quality on linen canvas:

Giovanni Battista Lampi the Elder (de: Johann Baptist von Lampi der Ältere; December 31, 1751 – February 11, 1830) was an Austrian historical and portrait painter.
He was born at Romeno, today in the Italian Province of Trento. He became a professor at the Vienna Academy in 1786, but subsequently he resided in Russia, where he devoted himself to portrait painting, and amassed a large fortune. He died at Vienna. He painted a portrait of the Empress Maria Fedorovna. His son, Johann Baptist the Younger, was also a painter.