Twitter user, Michal Wilczewski noticed a chalk-drawn door marked Hogwarts on his train ride and had to ask an expert. Wilczewski caught sight of this on the Blue Line at the Damen stop, snapped a pic and tweeted it to Harry Potter creator, J. K. Rowling

@jk_rowling can you tell me more about this door to Hogwarts at the Damen Blue Line stop in Chicago? pic.twitter.com/9O5IcAopU0

— Michał Wilczewski (@mehow87) April 25, 2018

To his surprise, the famed author tweeted him back confirming that the drawing is indeed a doorway to Hogwarts for exchange students.

It's for exchange students from Ilvermorny. Duh. https://t.co/pcZdtZAmtp

— J.K. Rowling (@jk_rowling) April 25, 2018

Seeing the response from Rowling prompted Michal to call this, “The most magical day of his life.”  Chicago students may want to consider witchcraft and wizardry for your summer school plans.