Fredrik III (1597-1659), Duke of Holstein Gottorp and Maria Elisabet (1610-1684), Princess of Saxony Unknown painters

The picture has something of this: people, man, woman, group, two, wear, room, seat, indoors, veil, god, furniture.
Perhaps it’s a painting of two men standing next to each other in front of a black and white checkerboard floor with a red table cloth draped behind them.