Hi demon_box,
thank you for your hints.
I try to be careful by mapping and appreciate your help.
a) how could I now how to map civic numbers? Is this possibly part of a wiki entry? If not, would you pls add this?
b) how to map paths and streets that are going really through buildings? Sould it be a Tunnel? Bridge? eg beside Via Roina 21? Are you a local?
Thank you!