A real 'Potions Master' called Professor Snape actually taught at a Welsh university in the 19th century

http://www.radiotimes.com/news/2015-12-22/a-real-potions-master-called-professor-snape-actually-taught-at-a-welsh-university-in-the-19th-century

Hogwarts in the Snow at Warner Bros. Studio Tour London – The Making of Harry Potter

Until 31 January 2016

http://www.visitlondon.com/things-to-do/event/33177725-hogwarts-in-the-snow-at-warner-bros-studio-tour-london-the-making-of-harry-potter

http://www.mtv.com/news/1572107/harry-potter-author-jk-rowling-opens-up-about-books-christian-imagery/