Many of Portsmouth's former defences are now museums or event venues. Several Victorian-era forts on Portsdown Hill are tourist attractions; Fort Nelson, a its summit, is home to the Royal Armouries museum. Tudor-era Southsea Castle has a small museum, and much of the seafront defences leading to the Round Tower are open to the public. The castle was withdrawn from active service in 1960, and was purchased by Portsmouth City Council. The southern part of the Royal Marines' Eastney Barracks is now the Royal Marines Museum, and was opened to the public under the National Heritage Act 1983. The museum received a £14 million grant from the National Lottery Fund, and was scheduled to relocate to Portsmouth Historic Dockyard in 2019. The birthplace of Charles Dickens, at Mile End Terrace,{{sfn|Hewitt|2013|p=73}} is the Charles Dickens' Birthplace Museum; the four-storey red brick building became a Grade{{nbsp}}I listed building in 1953. Other tourist attractions include the Blue Reef Aquarium (with an underwater safari of British aquatic life) and the Cumberland House Natural History Museum, housing a variety of local wildlife.