My research indicates this is most likely a copper engraving, antique in age and titled Port of Dresden or View of Port of Dresden.  Artist was Pieter (1646) Schenk. The frame measures  18" by 13.5", print itself is 10.5" by 8.75". The frame has lots of damage, loss of gold and loss of black. Print is nicely protected under the glass but matting does show some discoloration. See photos. No rips or tears.