"12 Grimmauld Place was the ancestral home of the Black family, located in the Borough of Islington, London, in a Muggle neighbourhood, and the location was protected by a Fidelius Charm. As the house was invisible to the neighbourhood residents, the local Muggles have long since accepted the mistake in numbering which landed number 13 next to number 11." #harrypotterworld #wizardingworld #harrypotter #london #wizard #blackfamily