Procession at the Feast of Corpus Christi in Rome Egron Sellif Lundgren (1815-1875)

The picture has something of this: people, group, woman, many, wear, man, veil, church, position, music, ceremony, crowd, indoors, god, saint, Easter.
Perhaps it’s a painting of a group of people standing in a room with a lot of people on the floor and a man in a suit standing in the middle of the room.