where to begin? any ideas?

The list of hints for this clue is compiled by the Admin team based on hundreds of Quester's posts. We have deleted extraneous posts so that you can easily discern the most basic hints for this clue!

Many times, if you're not inputting passwords or going to another site - you're probably staying within the hpquest website.
www.hpfantrips.com/hpquest/_____.html
You'll find an answer and be substituting it in this main web url address.

You need to find the place the knight is at, not really the knight himself...

I recommend focusing on what replaced the former place mentioned!

Another general name for a building that lets the viewing public see art, exhibitions and artifacts.

Wikipedia is your friend here!!