Newcastle-under-Lyme Castle is a historic site located in the town of Newcastle-under-Lyme, Staffordshire, England. Originally built in the 12th century, the castle served as a defensive structure and a royal residence. Today, only the earthworks and some remnants of the stone walls remain, but it is an important part of the town's heritage. The castle was strategically positioned to control the area and protect against invasions. Over the centuries, it underwent various modifications and was involved in several historical events, including the English Civil War. Today, it is a scheduled ancient monument, attracting visitors interested in history and archaeology.