An old abandoned department store in Muggle London, Purge and Dowse Ltd. is actually a false front that prevents Muggles from seeing St. Mungo’s Hospital for Magical Maladies and Injuries (OP22). This department store must have sat abandoned for years, with people disappearing into it all the time. St. Mungo’s is over 400 years old – meaning it couldn’t have been in the same place (or at least with the same storefront) the whole time. Maybe the hospital magically moves every few years. As with many of the places in London, its exact location is unknown, though we have a pretty good guess.
Bethnal Green Charing Cross Road Clapham Diagon Alley Downing Street Elephant and Castle Grimmauld Place Grimmauld Square King’s Cross Station London Underground
Ministry of Magic Headquarters Muggle library Museum of Quidditch newsagent’s Orphanage Paddington Station Post Office Tower Private hospital Pudding Lane Purge and Dowse Ltd.