Aegidius Sadeler II (circa 1570-1629) Portrait of Emperor Mathias I of Habsburg. 1614. Burin. 421 x 675 Hollstein 310. A very fine proof on cream laid paper, addressed to Marco Sadeler, carefully washed, trimmed with the coup de planche, and complete with the tablet. Several median horizontal folds, some fractured and skilfully restored on verso. Minor foxing and soiling. Oblique fold in lower right-hand corner. Adhesive remnants of an old frame at the edges of the verso leaf.