The Nemi Ships were huge and exceedingly luxurious ships built by the Roman emperor Caligula at the volcanic lake, few kilometers south of Rome. One was essentially an elaborate floating palace, which counted marble floors and plumbing among its amenities, the sole role of which was to satisfy Caligula's increasingly self-indulgent behavior.
In the imperial age, Caligula built ultra luxurious ships, to spend his leisure time or to celebrate rituals and festivities in honor of the Geodes Diana. This gigantic ships had spas and temples covered with terracotta tiles, or bronze covered with gold patina. Also columns of varying size and shape were erected, mosaic floors, statues and other works in bronze finely worked, and still statues, lion heads, rings for the rudders and many, many other things. Among these, as we have seen, the fistulae leaden that assured water supply, starting from the shores of the lake and coming to the ships, and all the numerous people who accompanied the emperor on the: distinguished guests, dignitaries, musicians, soldiers, friends and enemies ... given the order that made Caligula and his ships.
The two vessels measured a 73 m long x 24 m wide and the other 71 x 20, both of sturdy planks of pine tar coated externally wool and sheets of lead, fixed to the plating with copper nails.