Flags of the World: Pennsylvania
Information, images, and available history of the current and past flags of the state.

Geography and Maps of Pennsylvania
A plethora of geographical information and online maps from the About Geography site.

Infoplease.com: Pennsylvania Overview
A fantastic short historical overview, contemporary data, and a map from Infoplease.com

Pennsylvania History
An extensive narriative history of the state, divided into five chronological portions.