Romaniote Jews in the context of "Jewish ethnic divisions"

Jewish Koine Greek, or Jewish Hellenistic Greek, is the variety of Koine Greek or "common Attic" found in numerous Alexandrian dialect texts of Hellenistic Judaism, most notably in the Septuagint translation of the Hebrew Bible and associated literature, as well as in Greek Jewish texts from the Levant. The term is largely equivalent with Greek of the Septuagint as a cultural and literary concept rather than a linguistic category. The minor syntax and vocabulary variations in the Koine Greek of Jewish authors are not as linguistically distinctive as the later language Yevanic, or Judeo-Greek, spoken by the Romaniote Jews in Greece.

The term "Jewish Koine" is to be distinguished from the concept of a "Jewish koine" as a literary-religious—not a linguistic—concept.

The history of the Jews in Turkey (Turkish: Türk Yahudileri or Türk Musevileri; Hebrew: יהודים טורקים, romanized: Yehudim Turkim; (Ladino: Djudios Turkos) covers the 2400 years that Jews have lived in what is now Turkey.

There have been Jewish communities in Anatolia since at least the beginning of the common era. Anatolia's Jewish population before Ottoman times primarily consisted of Greek-speaking Romaniote Jews, with a handful of dispersed Karaite communities. In the late fifteenth and early sixteenth centuries, many Sephardic Jews from Spain, Portugal and South Italy expelled by the Alhambra Decree found refuge across the Ottoman Empire, including in regions now part of Turkey. This influx played a pivotal role in shaping the predominant identity of Ottoman Jews.

The Constantinopolitan Karaites or Greco-Karaites are a Karaite community with a specific historical development and a distinct cultural, linguistic, and literary heritage stemming from their residency in the capital of the Eastern Roman Empire. There are numerous commonalities between the community and the Rabbinical Romaniote Jews.

Sabbatai Zevi (Hebrew: שַׁבְּתַי צְבִי, romanized: Šabbəṯay Ṣəḇī, August 1, 1626 – c. September 17, 1676) was an Ottoman former Jewish mystic and rabbi from Smyrna who converted to Islam. His family were Romaniote Jews from Patras.

Active throughout the Ottoman Empire, Zevi claimed to be the long-awaited Jewish Messiah and founded the Sabbatean movement. Central to his teachings was the belief that during the Messianic Age, acts traditionally considered sinful would transform into righteous ones. This antinomian doctrine led Zevi and his followers to deliberately violate Jewish commandments, a controversial practice that later inspired movements like the Frankists.