In the lower left corner the artist concealed his signature on this original etching. Mielatz depicts Prince Henry of Portugal in the 15th century think tank of astronomers and mathematicians. an attached paper overlay describes and attributes the work.. The 17" x 22 3/4" matt is somewhat discolored around the edges. The 10 v 13 1/2" etching has remarkable detail down to the shadows cast on the tile floor. this fascination work from a large portfolio was purchased at auction. This etching has aged to a warm sepia tone and is in excellent condition.