Carisbrooke Castle has been a central place of power and defence on the Isle of Wight for over 1,000 years. During that time, it has been a Saxon fortress and a castle of the Norman conquest, much remodelled during the Middle Ages and under Elizabeth I. Most famously, Charles I was held prisoner here during the Civil War, shortly before his execution.
At the outset of the Civil War in 1642 the castle passed into the hands of the Parliamentary forces. Its principal use until 1660 was as a prison for important Royalists, the most notable inmate being Charles I in 1647–8. Charles I came to the island in November 1647 after he had escaped from house arrest at Hampton Court, in the hope that he might be able to act more freely. But he quickly found that he was again a prisoner, this time in the castle. He was housed with some ceremony in the hall range, attended by members of his own household. http://www.english-heritage.org.uk/visit/places/carisbrooke-castle/
Part of the hall Range was his personal quarters and outside is some magnificent stained glass which creates a glass screen into his bedroom. The design involves a central Tudor Rose(representing his link to Elizabeth 1) and smaller panels of lily of the valley.