The Reales Atarazanas is a waterside building that housed the shipyards, warehouses, customs house and tax offices of the old port of Santo Domingo, Dominican Republic. It was the property of the Spanish Crown. Begun in 1509, the Atarazanas is the oldest building of its type still standing in America, and one of a handful remaining in the Spanish world, amongst which are the Atarazanas Reales de Barcelona, in Barcelona, the Atarazanas Reales de Sevilla, in Seville, the Atarazanas del Grao in Valencia and the Royal Dockyard in Havana.