Hendrick Goltzius and Willem van Tetrode: two related exhibitions have admirably demonstrated a refreshingly outward-looking side of renaissance Dutch art.

It is a rare event to have two related exhibitions present to the public a pair of important artists who are none the less comparatively unknown. While Hendrick Goltzius (1558-1617) has enjoyed consistent appreciation since his lifetime as one of the great northern printmakers (third only to Durer and Rembrandt), the sculptor Willem van Tetrode (c. 1525-80) remains an obscure figure beyond a small circle of bronze statuette connoisseurs. These pendant exhibitions were on view in Amsterdam's Rijksmuseum last spring, and last summer the Goltzius show moved to the Metropolitan Museum…