architectural elements 11 front walls 9 thermal insulation 9 rebuildings 4 architecture 3 library buildings 3 tinsmith works 3 more ... roof covering 3 reconstruction 3 roofs 3 architectural composition 2 architectural designs 2 concrete constructions 2 churches (architecture) 2 cultural constructions 2 ancient monuments 2 building designing 2 towers 2 office buildings 1 history 1 observatories 1 libraries 1 cupolas 1 air transport 1 airports 1 runways 1 foot-bridges 1 museums 1 copper 1 low energy buildings 1 less ...