The small panel painting of The Madonna lactansin a Landscape in the Christian Museum of Esztergom was attributed by its former owners to Petrus Christus. The composition derives from a popular painting by Robert Campin, The Virgin in an Apse. The technical examinations of the painting proved, that the panel is heavily overpainted. Allthough the dendrochronological examinations proved that the panel itself is from 1445–1455, the style of the painting is close to Barend van Orley.
The prototype of the Infant in the Virgin and Child before a Firescreen was probably an anapesōn representation. This time, Campin was presumably directly influenced by Byzantine art. Early Netherlandish painters were similarly motivated to draw on Byzantine models as their Italian contemporaries were driven to the sculpture of classical antiquity.