The site has been fortified since ancient times due to its strategic position guarding the lowest crossing point of the River Forth, which historically separated the Lowlands from the Highlands. The castle dates back to at least the early 12th century, with most of the present buildings constructed between the late 15th and early 17th centuries under the Stewart (Stuart) monarchs.It played a pivotal role in Scotland's Wars of Independence:It changed hands multiple times between Scots and English forces.
In 1304, it was the last major Scottish stronghold held by the English.
Nearby battles include William Wallace's victory at Stirling Bridge (1297) and Robert the Bruce's triumph at Bannockburn (1314), both fought for control of the castle.