The Jewish communities of Egypt and North Africa are arguably the best-documented Jewish communities in the medieval Islamic world (with the possible exception of those of Palestine). The riches of the genizot of Cairo and geonic responsa open unparalleled vistas for the study of Jewish life in these regions and attest to the strong links between them. As explored further below, Egypt and North Africa shared a common orientation toward the Mediterranean and were tied by a vibrant maritime and overland trade. In 969, the dynasty that had ruled over the central Maghrib from the beginning of the century conquered Egypt and subsequently proclaimed this victory by establishing its new capital in it (Cairo, Arabic al-Qāhira, “the victorious”). The transfer of the religious, military, and administrative center of the empire from the Maghrib to Egypt constituted another strong connection between the two regions. The combination of these commercial and political ties brought about a substantial migration and settlement of Maghribī Jews to Egypt, a process that further bonded the regions together and proved decisive in shaping their Jewish communities.