Visit Claremont Square, rumored to inspire 12 Grimmauld Place

https://www.scribd.com/document/997662955/London-Harry-Potter-Store-Locations-From-House-Merch-to-Exclusive-Finds-136289

Visit Claremont Square, rumored to encourage 12 Grimmauld Place, and have an understanding of the moody Georgian terraces that are compatible the saga.