When Gustave Eiffel completed his wrought iron tower on Paris's Champ de Mars for the World's Fair in 1889, he laid claim to the tallest structure in the world. Though the Chrysler Building would, 41 years later, scrape an even higher sky, the Eiffel Tower lost none of its lofty wonder: originally granted just a 20-year permit, the Tower became a permanent and mesmerizing fixture on the Parisian skyline. Commanding by day, twinkling by night, it has mesmerized Francophiles and lovers, writers, artists, and dreamers from all over the world, welcoming around seven million visitors every single year.