Salem Witches Institute   DarkMarkcom is not a reliable source for verification on whether this is a school or not According to Salem witch trials In the fourth book of the Harry Potter series Harry Potter and the Goblet of Fire a group of middleaged American witches are observed by Harry as sitting under a banner reading The Salem Witchs Institute at the Quidditch World Cup This is a probable reference to the Salem trials If the witches were middleaged they would hardly be at school the reference itself seems to be more of a pun on Womens Institute Either way without confirmation either within the books or from the author whether Salem Witches Institute is a school or not is purely speculation even if the speculation is linked back to a fan website such as DarkMarkcom  Im moving Salem Witches Institute from the schools sublist to the main list