Eriksen, Virgilius. Portrait of Grand Duke Paul Petrovich in the training room Hermitage ~ part 13

The picture has something of this: people, music, performance, wear, portrait, theater, theatre, woman, stage, man, singer, musician, opera, fame, costume, actress, movie.
Perhaps it’s a painting of a man in a red coat and red pants standing in front of a table with a globe and a chair.