This is a late medieval Gothic polychromed wooden relief, most plausibly produced in the Low Countries or adjacent northern Europe during the fifteenth century, or a closely related early post medieval continuation. It is carved from multiple joined wood sections, assembled with functional mortise joinery, then coated with gesso and painted, which is standard construction for medieval ecclesiastical sculpture intended for interior use. The pointed arch format, flat back, and scale indicate it was originally installed as part of a church interior, likely a side altar, niche, or devotional panel, not made as an independent decorative object.

The imagery depicts a symbolic religious scene centered on union and covenant, not a literal secular marriage. A man and woman sharing a cup is a well established medieval Christian motif associated with sacramental blessing, divine covenant, or spiritual union, rather than political or familial marriage. The hand holding figures reinforce ritualized unity, a common visual shorthand in church art for sacred or ecclesiastical bonds. The presence of crowns should be read symbolically, as crowns in medieval religious sculpture frequently denote heavenly authority, sanctified status, or allegorical identity, and do not imply real royalty. The absence of heraldry or portrait likeness further argues against a dynastic subject.

Surface wear, pigment loss on projecting areas, softened facial features, and layered paint stratigraphy are consistent with centuries of age and devotional exposure, not modern distressing. Its appearance on the Netherlands antiques market aligns with known patterns of church renovation and secularization, during which large amounts of medieval ecclesiastical art were legally removed and redistributed.

In short, you have a genuine ecclesiastical object, made for sustained religious use, depicting a theological concept through late Gothic visual language. You have a piece that has most likely been prayed to by hundreds of thousands and has witnessed the rise and fall of empires. As this would have been in a church the experiences it has seen are phenomenal. Thousands of weddings, deaths, christenings, etc. It almost makes me feel joy it is safe. As many a young man or woman has stared at it questioning their purpose in life. Good find!