This painting, created in 1434 by the Flemish painter Jan van Eyck, is known as the Arnolfini Portrait. It is an oil painting on oak panel and depicts a wealthy couple, Giovanni di Nicolao Arnolfini and his wife, in a private moment.
From Wikipedia
The Arnolfini Portrait is an oil painting on oak panel by the Early Netherlandish painter Jan van Eyck, dated 1434 and now in the National Gallery, London. It is a full-length double portrait, believed to depict the Italian merchant Giovanni di Nicolao Arnolfini and his wife, presumably in their residence at the Flemish city of Bruges.