How has carrickfergus castle been used since it was built?

Carrickfergus Castle, built in the 12th century, has served multiple purposes throughout its history. Initially constructed as a defensive stronghold, it played a crucial role in military conflicts, including the Norman invasions and later skirmishes in the English Civil War. Over the centuries, it transitioned from a military fortress to a royal residence and administrative center. Today, it functions as a historic site and tourist attraction, showcasing its rich heritage and offering insights into medieval life.