Presented for your amusement: Princess Principal is an anime about a team of spies, set in a steampunk version of London around the turn of the 20th century. (Residents of the UK can watch the show - legally, of course - on sites such as such as HiDive.com. It is presently 5 episodes into the season.) Key to the intrigue and espionage in the "Kingdom of Albion" is the princess, third in line to the throne, who is attending a posh institution styled as "Queen's Mayfair School." This school is featured as a central location in several episodes and a peripheral location in all the others; its location and its architecture are each a dead ringer for Dulwich College. (They do a rather well-researched job of London in general, as well.)