It was the first institution in Spain to be designated a General Archive by Philip II in 1540.
The archive contains original documents related to the voyages of Christopher Columbus and the Spanish Armada.
The building was historically used as a royal prison for high-profile figures, including the Bishop of Zamora.
It holds one of the most complete collections of historical maps and administrative records of the Spanish Habsburgs.
The structure serves as a protected historical monument managed by the Spanish Ministry of Culture.
Documents are preserved in specific rooms designed to maintain environmental stability for parchment and paper.
It contains the 'Patronato Real' collection, which represents the most sensitive documents of the monarchy.
The archives were used to prove Spanish territorial claims in the Americas during diplomatic disputes.
The Castle of Simancas, known as the General Archive of Simancas, functions as a high-security state archive for the Spanish Crown. Built in the 15th century on the site of a 10th-century fortress, it was transformed into a storage facility for royal records by Philip II. It houses millions of documents spanning from the Middle Ages to the 19th century, including treaties, maps, and Inquisition records. The structure retains its defensive exterior character, including a moat and high stone walls. It is one of the most important historical archives in Europe, central to the administrative history of the Spanish Empire. The interior courtyards and vaulted chambers were specifically adapted for document preservation.
From the bridge crossing the dry moat, capturing the exterior stone architecture and corner towers.
Check the official website in advance to verify if temporary exhibitions are open to the public.
Bring a government-issued photo ID, as it may be required for entry.
Combine your visit with a walk through the town of Simancas, which has preserved much of its medieval layout.
Assuming the entire castle is a museum; large portions remain restricted administrative archive spaces.
Closed on weekends and major public holidays; often restricted during academic research cycles.
Quiet voices are expected due to the facility's nature as an archive; photography of sensitive documents may be restricted.
