Where is it?

Here are 13 pictures of a few big cities from the beginning of 20th century - they are part of the Czech school exhibition. Can you guess which cities they are? To make it a bit easier for you, here is the list in the alphabetical order: BERLIN, BUDAPEST, CALCUTTA, GRANADA, HAMBURG, LONDON, MECCA, NEW YORK, PARIS (TWICE) , RIO DE JANEIRO, ROME, STOCKHOLM.

Both the Czech and German students tried to estimate from which cities the old pictures were. They worked in teams. It was not easy at all. In spite of that, in case of quite a lot of the cities, their guesses were correct.