The Baptism of Christ

Juan de Flandes ("John of Flanders"; c. 1460 – by 1519) was a Flemish painter active in Spain from 1496 to 1519. His actual name is unknown, although an inscription Juan Astrat on the back of one work suggests a name such as "Jan van der Straat". Jan Sallaert, who became a master in Ghent in 1480, has also been suggested. He worked in the Early Netherlandish style.

He may have been born around 1460 somewhere in Flanders, Flandes in Spanish, which encompassed modern Belgium, Netherlands, Luxembourg and bordering regions of France. He evidently trained in his home country, most likely in Ghent, as his work shows similarities to that of Joos van Wassenhove, Hugo van der Goes and other Ghent artists. He is only documented after he became an artist at the court of Queen Isabella I of Castile, where he is first mentioned in the accounts in October 1496.

He is described as "court painter" by 1498 and continued in the queen's service until her death in 1504. He likely lived in Burgos and mostly painted portraits of the royal family, but also the majority of a large series of small (21.3 x 16.7 cm) panels for a polyptych altarpiece for the queen.