So a question I often pose to myself in idle hours (not that I have any "idle hours" anymore; "idle forty seconds" is the most I can hope for) is: is there a garment you could wear in any era? Say, if you were a time traveler (for example, cough, a companion to a certain Time Lord, cough)?
This pattern might be a contender (especially the cowl-neck Princess Leia version). Doesn't it say "I'm going to get medieval on your ass" and "the future has stewardesses" simultaneously? If it were made from that fabric they had in the Zenna Henderson stories which could be smoothed and stretched to any length, this would be perfect. Lengthen the skirt for the past, raise it for the future, add a nice cardigan and go anywhere in space or time!
This pattern has a very precise location in space and time: it's at CoconutPie's Etsy shop. (And Susan at Coconut Pie offers a a 10 per cent discount to anyone who mentions "dressaday" in their notes to seller.)