The Seville Shipyards () is a medieval shipyard in the city of Seville (Andalusia, Spain). They were operative between the 13th and 15th centuries, and are built in Gothic style. They were specialized in the construction of galleys, which played an important role in the struggles for the control of the Strait of Gibraltar, as well as in the Castilian participation in the Hundred Years' War. The complex consisted of a building with seventeen naves next to a large sandy area that reached to the edge of the Guadalquivir River. On March 13, 1969, the State declares Monumento Histórico Artístico to the Shipyards, and on June 18, 1985 the degree of protection of the property declaring the Maestranza de Artillería de Sevilla (which occupies the seven naves that are conserved and other structures, such as a front pavilion) Bien de Interés Cultural in the Monument category. Background The first news about shipyards in the city dates back to the 1st century BC, when the civil war between Pompey and Julius Caesar took place: In the 9th century a series of Norman attacks (Vikings) occurred on the peninsular coasts, one of them in Seville. This motivated Caliph Abd ar-Rahman II to reinforce the wall of Isbylia (Seville) (of Roman origin) and to create a permanent war fleet. To this end, he ordered the construction of some shipyards in Seville: Some 200 years later, in 1184, the caliph Abu Yusuf Yaqub al-Mansur ordered the then governor of the city, Abu Dawud Yalul ben Yildasan the manufacture of some shipyards where, in a short space of time, build a large fleet to deal with the Christian kingdoms. t is not known with certainty where the former shipyards were located. According to the archaeological work carried out, it is known that the Castilian shipyards that are still in use today were not built on any previous ones. Original design Ferdinand III of Castile, conquered Seville from the Muslims in 1248. After making conquests for a large part of the peninsula, he decided to undertake military campaigns to also take the north of Africa and thus prevent possible threats that could come from that area. He decided to build several ships and galleys in Seville. However, Fernando dies in 1252 and his son, Alfonso X of Castile "the Wise", agrees with the usefulness of creating a fleet and orders the construction of the shipyards. The