[wastedyears]

I’m drawing a blank on MWP.

Did you mention the Maunder Minimum, though?

[AlexW]

“I’m drawing a blank on MWP.”
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Medieval Warm Period.... somewhere around 900 to 1400 AD.
It is when Europe really started to develop, and exploration took off.
Greenland was colonized, and supposedly they were able to grow grapes and make wine.
The MWP was followed by the “Little Ice Age”.