There is a possibility to look at web overlaping of the old pictures and up to date photos of the same views of Prague. Here there are bout 29 old pictures/ new photos of Prague : http://aktualne.centrum.cz/domaci/grafi ... a-sto-let/
Amazing pictures! But it would be better to compare it also with Langweil model of Prague. It should be quite easy because the model was recently digitalised.