How many Norman castles are there in great Britain?

There are more than 1,000 Norman castles in Great Britain. Of these, over 100 are considered to be significant national landmarks and are protected as Scheduled Ancient Monuments. The majority of these castles were built between the 11th and 13th centuries, with some earlier examples dating back to the 10th century. The most famous Norman castles include the Tower of London, Dover Castle, and Warwick Castle.