At this time, Jews from North Africa came to settle in Egypt after the Fatimid conquest of Egypt in 969. These Jewish immigrants made up a significant amount of the population from all the Jews living in Egypt. Due to the discovery of the Cairo Geniza documents at the end of the 19th century, a lot is known about Egyptian Jews. From private records, letters, public records, and documents, these sources held the information about the society of the Egyptian Jews.