The History, Culture, and Language of the Jews of Bulgaria https://mosaicmagazine.com/picks/history-ideas/2015/05/the-jews-of-bulgaria/

May 29, 2015 | Marcel Israel
About the author:

Bulgaria, which has been home to Jewish communities since at least the 3rd century CE, gained a large Jewish population only when, after 1492, Jews expelled from Spain settled there, bringing their language and customs with them. During World War II, despite the fact that Bulgaria allied itself with Germany, the overwhelming majority of Bulgarian Jews survived, migrating to Israel en masse after 1948. Marcel Israel discusses both the history of Bulgaria’s Jews and the current state of Jewish life there. (Interview by Linda Jiménez; audio, 18 minutes).

Read more on Radio Sefarad: http://www.radiosefarad.com/dr-marcel-israel-sephardic-jews-in-bulgaria/