architecture

    Top: Regional: North_America: United_States: Pennsylvania: Arts_and_Entertainment: Architecture:

• - Promotes the preservation of covered bridges in the state. Includes details of activities, an illustrated guide to truss types and a list of covered bridges in the state.
  
• - Photographs and information from Dr Roger McCain.
  
• - Photographic catalog by Daniel Alward of historic iron and steel bridges mainly in Pennsylvania.