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History House Productions:
https://www.youtube.com/c/HistoryHouseProductions

Sources:

Shlomo Simonsohn
The Apostolic See and the Jews
http://books.google.co.il/books/about/The_Apostolic_See_and_the_Jews.html

Maristella Botticini, Zvi Eckstein, and Anat Vaturi
“The Chosen Many: Population Growth and Jewish Childcare in Central-Eastern Europe, 1500-1930” [PDF] https://sapir.tau.ac.il/sites/economy.tau.ac.il/files/media_server/Economics/Sapir/papers/%D7%A6%D7%91%D7%99%D7%A7%D7%94%20%D7%90%D7%A7%D7%A9%D7%98%D7%99%D7%99%D7%9F_%20%D7%9E%D7%95%D7%9B%D7%9F_%204-16.pdf
Tel Aviv University

Stuart Dowell, the First News
“No Way, No Plague: Was Poland Once an Island of Immunity?”
https://www.thefirstnews.com/article/no-way-no-plague-was-poland-once-an-island-of-immunity-10943

Shai Carmi, Ken Y. Hui, et. al.
Sequencing an Ashkenazi reference panel supports population-targeted personal genomics and illuminates Jewish and European origins”
https://www.nature.com/articles/ncomms5835

0:00 Intro
0:43 Early Polish Statehood
2:00 The Statute of Kalisz
4:07 Casimir the Great
6:15 The Black Death
10:08 The Birth of Yiddish