Titian's Painted Stones: Slate, Oil and the Transubstantiation of Painting
Titian’s Ecce Homo and Mater Dolorosa with Open Hand (both Madrid, Museo del Prado) stand out for a number of reasons. Firstly, they were not commissioned but were done as gifts, so they reflect Titian’s artistic volition rather than the will of a patron. Secondly, the materials that Titian chose to use demand attention: the Ecce Homo is painted on slate while the Mater dolorosa is painted on a slab of marble.