Greek-speaking Israelite communities in the eastern Mediterranean formed the roots of the later Romaniote stream. Their world included synagogue life, Greek civic language, maritime commerce, and settlement in cities of Greece, Asia Minor, the Aegean, and the Black Sea. These communities were already embedded in Hellenistic and Roman urban networks before 70 AD.

The later Romaniote rite belongs to the Byzantine period, but its foundation is older: Greek-speaking covenant communities shaped by the Second Temple world and eastern Mediterranean geography. The map connects this stream both backward to Alexandria/Hellenistic dispersion and forward to post-70 diaspora expansion.