Office building "Sprinkenhof", stairway, Hamburg, Germany, Europe

above angle architectural architecture building buildings design detail details elevated europe european federal form formation formations forms frg from geometric geometrical geometrically geometry german germany hamburg helical high high angle inboard indoor indoors inside interior internal nobody north northern of office perspective perspectives photo rail rails republic round shape shaped shapes spiral spiry sprinkenhof stair staircase staircases stairs stairway stairways stairwell stairwells step steps top topview topviews turreted view views