"https://en.wikipedia.org/wiki/List_of_regions_by_past_GDP_(PPP)"

HAHAHA! Are you for real? Try the per capita list that accounts for the sheer volume of the population.  At best, these are vague estimates because no financial data was every collected back then, but even so, you can't just pretend that India and China didn't have significantly more people than anyone else, which would boost raw GDP data, severely:

https://en.wikipedia.org/wiki/List_of_regions_by_past_GDP_(PPP)

Adjust for that population, and it tells a different picture, doesn't it?