Prague - a walk through the historic center

I'm going to Prague by train, walk through the center and take some photos. In today's busy times, one does not have time to spare, so I combined the pleasant with the useful. I needed to send a package to the children at summer camp, but due to work reasons I couldn't get to the post office in Kladno. I took advantage of the fact that we have Prague's parent company nearby, so I went to the Main Post Office, which is also open on Sundays.
After about an hour's train ride…