Pair of Baroque Celestial Maps, Johann Zahn

Pair of 17th century hand colored, copperplate engraved Baroque celestial maps by Johann or Johannes Zahn (1641-1707), "Facies Hemisphaerii Coelestis Inferior Austalis" and "Facies Hemisphaerii Coelestis Superior Borealis" published in his book "Specula Physico-Mathematico-Historica Notabilium ac Mirabilium Sciendorum" (Nuremberg, 1696). Sight: 14" H x 16 1/2" W. Framed: 20 1/4" H x 22 1/2" W. Provenance: Private Nashville collection; acquired Case Auction July 18, 2015; the estate of Lucille Svitzer Brady (Mrs. Frank B. Brady), formerly of Annapolis, Maryland.
Condition Report: Overall very good condition with light toning, light fading on the vertical fold lines, and light pencil annotations in corners.