Hi OP. No, we don't have any kind of filtering set up for that sort of thing. While it would be very handy in a lot of ways, the questions here come in too many potential time periods, regions, cultures, and combinations thereof for us to be able to set this up. The only thing I can think of - other than simply searching posts for keywords like "Middle Age" and "Medieval" or "14th century" etc - is the FAQ, which does break down some popular questions by time and place: https://www.reddit.com/r/AskHistorians/wiki/faq