The Castle was built between 1180 and 1190 by Walkelin de Ferrers, lord of the manor of Oakham, son of Henry de Ferrers, a nephew of Robert de Ferrers, 1st Earl of Derby (1062–1139). The Great Hall comprises a nave and two arcaded aisles, each with three large stone columns. There are a number of 12th century sculptures decorating the Hall including six musicians that are supported by the columns. The sculptures are carved from local stone quarried at Clipsham and are believed to have been made by masons who had also worked at Canterbury Cathedral.