8 Byzantine Empire Era Shipwrecks Excavated in Turkey. The shipwreck that researchers call YK 23, shown in its original position, in December 2007. Archaeologists working at a site in Turkey called Yenikapi have unearthed 37 remarkably well-preserved shipwrecks. The shipwrecks date back to the time of the Byzantine Empire, and are found in the port of the ancient city Istanbul, then called Constantinople. [Full story: Byzantine Shipwrecks Shed Light on Shipbuilding History].