The galleons were designed and developed by Spanish during the 15 th to the 17 th century. The galleons were used as a treasure and merchant ships as many others used in that period. However, many pirates were attracted by their large cargo, so they were armed well and sometimes they had been used as the warships. It was a large ship with an average capacity of 500 tons, and had a great speed for its size. Most galleons have three masts, two square rigged with a lateen sail on the stern-most mast. Two or more gun decks were also included with 70-100 guns. The poop deck was raised high and a crew counted 200-400 sailors. People say that galleon was the evolution of a caravel and was more maneuverable.