Imagine looking from the southern bank of the River Tagus towards the Jewish Quarter of Toledo’s historic center. To reach it requires a walk of 131 feet across the 14th century St. Martin’s Bridge. Its namesake is Martin of Tours, a 4th century Christian saint. Before you entered the city, you passed beneath this tower bearing an imperial coat of arms. The relief featuring a double-headed eagle (barely visible in the photo) represents Carlos I of Spain. The king was also called Charles V in his role as the Holy Roman Emperor.