Roads 204 History 57 Railroads 41 Description and travel 26 Church records and registers 22 Toll roads 18 Design and construction 17 more ... Canals 14 Streets 12 Road maps 10 Finance 9 Maintenance and repair 9 Bridges 8 Cemetery records 8 Historic buildings 7 Plank roads 7 Catholic 6 Cemeteries 6 Corporations 6 Highway law 6 Antiquities 5 Outdoor recreation 5 Pavements 5 Post roads 5 Roads--Pennsylvania--18th century 5 Transportation 5 Apartment houses 4 Business enterprises 4 Central business districts 4 Early works to 1850 4 Episcopal 4 Hotels & taverns 4 National road 4 National roads 4 Quakers 4 Recording 4 Roads--Maintenance--19th century 4 Subways 4 Trails 4 Turnpikes--Pennsylvania--19th century 4 less ...