I found an interview with the Art Director for the Wizarding World of Harry Potter (Alan Gilmore). You can view the interview below:
Thanks for visiting this website Harry Potter fans!
Wotcher people of the Internet! I hope you find this website useful... If you have any questions or comments or basically anything you'd like to tell me, please click here: https://harrypotterfanworld.wordpress.com/1715-2/
Thank you for visiting!