Philadelphia is known for its sweet, salty, and savory foods. From tomato pies to butterscotch krimpets and "wooder" ice, Philly certainly has a way of satisfying the food cravings you didn't even know you had. It's possible to go an entire day eating a famous Philadelphia food at every meal, sampling historic well-known restaurants and small vendors alike. While you've certainly enjoyed one of the following treats (if not, get to Philadelphia ASAP!), have you ever wondered about the history behind them?