One civilization's trash is another civilization's treasure. A ship in Israel's Caesarea Harbor was filled with bronze statues headed for recycling when it sank about 1,600 years ago. Now, thanks to a chance discovery by a pair of divers, archaeologists have salvaged a haul of statuary fragments, figurines and coins from the seafloor. The coins found in the wreckage date to the mid-300s A.D. Some show Constantine, who ruled the Western Roman Empire from A.D. 312-324, and who unified the Eastern and Western Roman Empire in A.D. 324; he ruled both until his death in A.D. 337. Other coins show...