The story of Indiana pizza is mostly one of regional influence and corporate greed. Indiana is caught between two equally strong forces, which basically carve the state in two. On the north is the strong pull of Chicago and its thin crust, tavern-style pizza. Pizza comes in squares up there, with a strong preference for sausage. Southern Indiana, on the other hand, seems to show a lot of influence from the hands of Papa John's, which originated in the southern town of Jeffersonville, only to multiply into the third biggest chain in the country.