Design and construction History 28 Conception et construction 22 Bridges 20 Skyscrapers 16 Buildings, structures, etc 15 Histoire 13 more ... Ponts 13 Buildings 11 City planning 8 September 11 Terrorist Attacks, 2001 8 Subways 8 Architecture 6 Planning 6 Roads 5 Monuments 4 Office buildings 4 Planification 4 Brooklyn Bridge 3 College buildings 3 Construction workers 3 Dwellings 3 Environmental aspects 3 Ponts suspendus 3 Suspension bridges 3 Waterfronts 3 Architecture, Domestic 2 Art museums 2 Aspect de l'environnement 2 Aspect social 2 less ...