Philadelphia is a city known formany thing. It is where the declaration of Independence was signed in 1776' and it was also the first capital of the United States. But one fact about Philadelphia is not so well-known: it is home to nearly 3,00 murals painted on the sides of home and building around the city. in fact ,it is said that philadelphia has more murals than any other city in the world, with the exception of Rome. How did this come to be?