How far back in history can one get data

i want to go way way back in history, (as far as possible) is there any free or otherwise data charting service anyone can recommend? maybe i’m using wrong search term, but NOTHING is coming up past the regular 15 year max historical charts (fxcm)

I know Reuters has data going back to the early 70s in some major pairs. The EOD data that MetaStock feeds off of has data back to 1982 for the majors, but in terms of HLC it’s more like 1986, I think.

Actually, if you’re fine with real basic “fixing” type data, the central banks like the Fed have historical figures going back a long way.