From a hill,
looking down the whole city, we can draw lines along the border in colors of the city.
Reddish-brown and some other pastel colors from bricks and stones are of Old town.
Dark greenish-brown (never blue) are of the Danube (Donau-River).
Green and light brown are of the fields.
and
Pale colors from concrete are of mammoth apartment buildings in a suburb;
they are like many pieces of Lego blocks in exactllz the same size.
it seems as if there is a big invisible ceiling to underline the sky.