If you want to say something the 10th and 11th centuries were likely the warmest of the last 3000 years (up to and including the 19th century). The coldest two centuries were the 17th and 19th for the last 2000 years. The 6th may also have been as cold, but there is much less evidence.
DESPITE DENIAL, GLOBAL TEMPERATURES ARE DROPPING FAST
42 minutes ago