| Name | The Nativity Altarpiece |
| Autonomous community | Castilla y León |
| Province | Burgos |
| City/Town | Merindad de Río Ubierna |
| Location | Hermitage of St. Martin, the Bishop in Sotopalacios |
| Date | Around 1435-1450 |
| Production | Brussels |
| Iconography | The infancy Narratives |
| Author | Willem Aerts (or Ards) |
| Technique | Carved polychrome decorated wood |
| Dimensions | 82 x 59 x 16,5 cm. |