architecture city early modern germany history quedlinburg Sachsen-Anhalt stone town unesco wall background brown century communication letter old paper pattern Scripture texture word write writting yellow aeroplane air air-industry air-travel airline airlines airplane angles blue blue-sky flight flying height high jet light lighting modern passengers perspectives plane sky speed transport transportation travel traveling travelling blur cloud-formations clouds silhouette abstract after hours block building business busy concept construction corporate corporation downtown exterior facade financial floor geometric glass glimpse industry labour lights office offices reflections shiny skyscraper toil tower trade view white collar windows work workplace bricks brickwork building-construction building-site building-work construction-site construction-work development elements external framed frames home home-units house linear lines metal metal-work straight structure style suburban urban views walls window-frames buildings cement-mixers equipment framework homes materials men mixers pipes sand supplies units workers workmen