Leaning Tower of Pisa
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In 1589, Galileo Galilei conducted various experiments on gravity at the Leaning Tower of Pisa. (PROSE: A Matter of Gravity)
Gioffre Borgia, who the Twelfth Doctor described as a "mucho, scary hombre", asked the Doctor what he thought of the Leaning Tower of Pisa, to which he answered "[that] it looked fine to [him]" (TV: Time Heist)
In 2012, Brian Williams visited it with the Eleventh Doctor. (TV: Dinosaurs on a Spaceship)
