King William II of England ordered Robert of Bellême to build the first castle at Gisors.
Henry I of England built the octagonal stone keep surmounting the motte; his work at Gisors was part of a programme of royal castle building in Normandy during his reign to secure the region against the aspirations of the French crown.
It saw the construction of more than 25 castles.

In 1193, while King Richard I of England (also Duke of Normandy) was imprisoned in Germany, the castle fell into the hands of King Philip II of France.
After Richard's death in 1199, Philip conquered much of the rest of Normandy and Gisors thereafter lost a good part of its importance as a frontier castle.

The castle is also known for its links with the Templars.
Put into their charge by the French king between 1158 and 1160, it became the final prison of the Grand Master of the Order, Jacques de Molay, in 1314.

Although it has been estimated that the bailey could have housed 1,000 soldiers, in 1438 (during the Hundred Years' War) the English garrison numbered just 90.
By 1448, this had decreased to 43.
King William II of England ordered Robert of Bellême to build the first castle at Gisors. Henry I of England built the octagonal stone keep surmounting the motte; his work at Gisors was part of a programme of royal castle building in Normandy during his reign to secure the region against the aspirations of the French crown. It saw the construction of more than 25 castles. 
In 1193, while King Richard I of England (also Duke of Normandy) was imprisoned in Germany, the castle fell into the hands of King Philip II of France. After Richard's death in 1199, Philip conquered much of the rest of Normandy and Gisors thereafter lost a good part of its importance as a frontier castle.
The castle is also known for its links with the Templars. Put into their charge by the French king between 1158 and 1160, it became the final prison of the Grand Master of the Order, Jacques de Molay, in 1314.
Although it has been estimated that the bailey could have housed 1,000 soldiers, in 1438 (during the Hundred Years' War) the English garrison numbered just 90. By 1448, this had decreased to 43.
Château de Gisors