History:The focal point of Marietta's historic district, The Castle has been the home of some of the area's most prominent and influential citizens.In 1842, "The hill up Fourth Street was almost impassable. Few teams tried it. On the brow of this hill dwelt Nathaniel Clark, the potter. He made milk pans, jugs, and jars. Above his house there was a large orchard where picnics were held. There...