Set Designer's Day - Research

I'm just starting on The Fantasticks for Circle Theater (if one show opens, the next starts).  I've read and noted the script - which I love - now I'm researching...

I don't usually look at earlier productions before I design - in case it over-influences me - but in this case the director wants to stay pretty close to the original production, so I've been looking at that.  I've also looked at  the touring productions.  Over-produced, I think.  Mind you, I understand exactly the problem the designers of those touring shows had: how to make this intimate show fill the usual huge venues on the road.  Fortunately, Circle's small space doesn't present that problem.  (Ha!  Circle's ceiling is only this high.)

Now I'm doing a little research on Commedia dell'Arte, the renaissance era Italian comedy troupes which much influenced this show.