The polychromy of five late 15th century North-Netherlandish sandstone sculptures was investigated. The sculptures had retained their original polychromy and were over-painted only once. The surface of the stone appeared to have been treated with glue. Depending on the final painting, different underpaintings were applied. Gildings were done upon an ochreous layer. The following pigments have been found: lead white, chalk, gypsum, malachite, azurite, lead-tin yellow, red lead, red ochre, vermilion, purpurin lake and bone black in the original paint layers and smalt, lead white, blue bice, a basic copper-lead chloride and Pattison white in the overpainting.