Metropolis is a fictional city appearing in American comic books published by DC Comics, best known as the home of Superman. First appearing by name in Action Comics #16 (Sept. 1939), Metropolis is depicted as a prosperous and massive city in the Northeastern United States, in close proximity to Gotham City. The co-creator and original artist of Superman, Joe Shuster, modeled the Metropolis skyline after Toronto, where he was born and lived until he was ten. Since then, however, the look and feel of Metropolis has been greatly influenced by New York City. Within the DC Universe, Metropolis is depicted as being one of the largest and wealthiest cities in the world, having a population of 11 million citizens. In addition to Superman, the city is also home to other superheroes, such as Booster Gold and Blue Beetle.