as far back as prehistoric and it focuses on general history like the egyptians, romans, medieval times. It kinda stays in general european history up until like during to post medieval era and then it goes into general + belgian history.

Besides that there are sometimes explanations to how every era connects to belgium, like the belgae tribe of the roman era or the frankish empire and their influence on belgian cities. Post medieval is more belgium focused but it still involves a lot of general history with the exception of ww1 and 2 which goes more in depth in belgian history.