Gérgal Castle was built somewhere during the Late Middle Ages during Muslim rule. By 1492 it had fallen into the hands of the Catholic Monarchs; Queen Isabella I of Castile and King Ferdinand II of Aragon. They donated the castle to Alonso de Cárdenas, Grand Master of the Order of Santiago, for outstanding services during the Granada War.
During the 16th century it played an important defensive role against the inland raids of Barbary pirates, who were supported by the remaining Moorish population. In 1568 the Moors rebelled and the Christians in Gérgal were massacred and the Moors held the castle. They were driven out some time later and the castle was destroyed by Christian forces to avoid a repeated use by the Moors. Between 1571 and 1620 all the Moors were expelled from the Iberian mainland. This left the area around Gérgal Castle depopulated and open to banditry.
During the first half of the 17th century Gérgal Castle was rebuilt on the site of the old Muslim fortification to restore order and favor repopulation in the area. In the middle of the 18th century it belonged to Isabel Pacheco Portocarrero, Countesss of Puebla del Maestre and Marchioness of Torre de las Sirgadas. She used it for storing storing grains.
The castle we see today dates back to the rebuilding in the 17th century. Its core is a square crenellated tower with lower round towers at its corners. At its north western facade and attached to one of the corner towers is a semicircular bastion. It is build up out of horizontally laid slabs of slate. The castle is now also equipped with a crenellated outer wall, but this was built by the present owner.References:
German crusaders known as the Livonian Brothers of the Sword began construction of the Cēsis castle (Wenden) near the hill fort in 1209. When the castle was enlarged and fortified, it served as the residence for the Order's Master from 1237 till 1561, with periodic interruptions. Its ruins are some of the most majestic castle ruins in the Baltic states. Once the most important castle of the Livonian Order, it was the official residence for the masters of the order.
In 1577, during the Livonian War, the garrison destroyed the castle to prevent it from falling into the control of Ivan the Terrible, who was decisively defeated in the Battle of Wenden (1578).
In 1598 it was incorporated into the Polish-Lithuanian Commonwealth and Wenden Voivodship was created here. In 1620 Wenden was conquered by Sweden. It was rebuilt afterwards, but was destroyed again in 1703 during the Great Northern War by the Russian army and left in a ruined state. Already from the end of the 16th century, the premises of the Order's castle were adjusted to the requirements of the Cēsis Castle estate. When in 1777 the Cēsis Castle estate was obtained by Count Carl Sievers, he had his new residence house built on the site of the eastern block of the castle, joining its end wall with the fortification tower.
Since 1949, the Cēsis History Museum has been located in this New Castle of the Cēsis Castle estate. The front yard of the New Castle is enclosed by a granary and a stable-coach house, which now houses the Exhibition Hall of the Museum. Beside the granary there is the oldest brewery in Latvia, Cēsu alus darītava, which was built in 1878 during the later Count Sievers' time, but its origins date back to the period of the Livonian Order. Further on, the Cēsis Castle park is situated, which was laid out in 1812. The park has the romantic characteristic of that time, with its winding footpaths, exotic plants, and the waters of the pond reflecting the castle's ruins. Nowadays also one of the towers is open for tourists.