This luxurious ship was built on Lake Nemi, Italy, during the reign of the Emperor Caligula (37-41 A. D.). It sank to the bottom at some unknown period, and has often been examined by divers, for it is still in a fair state of preservation. It is 250 feet long, and its equipment was of the most luxurious kind. Suggestions for its recovery have been made, and it is possible that the lake, which is a small one, may be drained in order to study this old ship and another one that is lying near it.