The Real Astillero de Esteiro was a royal shipyard in Ferrol in Spain. Orders for its construction were issued by Ferdinand VI of Spain on 9 April 1749, following the decision by the naval minister Zenón de Somodevilla to build new naval fortifications and installations in Ferrol and its surrounding area. Initial construction was managed by Cosme Álvarez, Comandante General of the Department. It was sited on the northwest slope of the monte Esteiro near Ferrol. It was initially planned to have four levels, but by the end this rose to twelve, proportional to the mountain's slope. Barracks, workshops and warehouses were also built.
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'Apostles'
At its height, through an order by the Marquis de la Ensenada dated 15 July 1752, the shipyard simultaneously built twelve 68 to 74 gun ships of the line simultaneously, popularly known as the "Twelve Apostles" or "Apostolate" class. This project greatly increased the arsenal's industrial activity, boosting the local civilian economy and increasing the town's population by drawing in the skilled workers needed. The twelve ships were: