"Δος μοι που στω, και κινω την γην" [give me a lever on a fulcrum, and i shall move the world], Archimedes said. The king Hieron II, who was absolutely astonished by the statement, asked him to prove it. In the harbour was the Syracusia, a 55 meters long ship, that had proved impossible to launch even by the combined efforts of many men from Syracuse. Archimedes, who had been examining the properties of levers and pulleys, built a machine. He then seated himself at some distance away and without using any noticeable force, but merely exerting traction with his hand through a complex system of pulleys, he drew the vessel towards him with as smooth and even a motion as if she were gliding through the water.
So reports Plutarch. And that ship was in fact the biggest cargo of the ancient time, the Syrakousia. Build by Archias of Corinth around 240 BC after an order of Hieron II, king of Syracuse, later it was given as a gift to Ptolemy III Euergetes of Alexandria and it was renamed to Alexandria.
Wood to make it was pine and fir from Mount Etna forests, cordage come from Spain. Hemp and pitch for caulking come from Massilia. Hull was fastened with cooper spikes, and also lead sheets were used to cover the planks. The material used for the Syracusia was enough to build 60 conventional trireme.
The first trip from Syracuse to Alexandria was of 60000 measures of grain, 10000 jars of pickled Sicilian fish, 20000 talents of wool, 20000 talents other cargo that adds up to 1900 tons of our time. Also, there were separate stalls to transport 20 horses. A container with 78 tons water was used to provide water for the passengers and for the bathroom with a water container heated with steam. Such ship was intended not only as a cargo, however, since it could carry also 400 soldiers on the first upper deck. Travellers will like to spent some money, so the Syrakousia provided 142 First Class passengers cabins on the second deck with a library and reading room, a gymnasium, a chapel dedicated to Aphrodite Pontia, a dining room and a bath; there were 15 rooms on each side each with 4 beds.
However, such a big ship need defense, so the Syrakousia had eight deck towers, each including a 18-foot arrow, plus a 180 pound stone catapult build by Archimedes. Such ship, as a cargo, need no oarsmen, since they were used only in battle, to move faster a warship.