The Chronology of Ancient Kingdoms Amended by Isaac Newtonwhich was published as an e-book in 2005.
It's a fun reading for the summer. You will learn about every one among hundreds of kings of dozens of empires and every single act they have done in their lives. ;-)
His memory had to be formidable. It's hard to match him. But one may try. I just memorized the 250,000 collisions in the Kaggle Higgs challenge which allows me to say whether an event is "signal" without a computer, with the score 3.5, without a computer. Fun. Why can't the computers be much better than we are? ;-)
Hat tip: Frank Wilczek (Twitter), thanks!