Cologne taken by Paolo Nespoli from the Cupola of the International Space Station on 11 May. The ‘Kalk’ district, and the city centre, ‘Innenstadt’, are on the upper part of the river. Kalk has a big convention centre with white roofs visible and it is connected to city centre by several bridges, like the Deutz, an icon of Cologne, leading to main railway station in the vicinity of the cathedral – another icon of the city. Both are just left below from the white light reflection from the Cupola window. In total, Cologne area has about one million inhabitants.