TIL that the Kingdom of Kongo was one of the longest lived in history, lasting in some way or another from c. 1390 to 1914 - about as much as the Western Roman Empire

https://en.wikipedia.org/wiki/Kingdom_of_Kongo

https://www.reddit.com/r/todayilearned/comments/15l2oyd/til_that_the_kingdom_of_kongo_was_one_of_the/