Portrait of the composer Alexander Serov, the father of the artist. 1888-1889 Valentin Serov (1865-1911)

The picture has something of this: people, man, portrait, scientist, wear, leader, famous, writer, mustache, lid, elderly, chair, poet, room.
Perhaps it’s a painting of a man in a suit leaning on a piano in a room with a lot of books on the shelves and papers on the floor.