Twelfth Night, Act II Scene IV Walter Howell Deverell (1827-1854)

The picture has something of this: people, group, woman, wear, child, many, man, celebration, ceremony, festival, dress, costume, veil, dancer, dancing, son, several.
Perhaps it’s a painting of a group of people standing in front of a fountain with a man on one knee and a woman on the other side of the water.