Joannes or John Zonaras (Ἰωάννης Ζωναρᾶς Iōánnēs Zōnarâs; 1070 – 1140) was a Byzantine Greek historian, chronicler and theologian who lived in Constantinople (modern-day Istanbul, Turkey). Under Emperor Alexios I Komnenos he held the offices of head justice and private secretary (protasēkrētis) to the emperor, but after Alexios' death, he retired to the monastery on the Island of Hagia Glykeria, (İncir Adası, in the Bay of Tuzla), where he spent the rest of his life writing books.
Almost nothing is known of Zonaras's life. However, various elements can be inferred from his own writings. In one of his writings he states that he "saw" the second marriage of an emperor. This could have been the marriage of Nikephoros III with Maria of Alania in late 1078 or perhaps even the marriage of Manuel I Komnenos to Maria of Antioch in 1161 which would put Zonaras' death significantly later. It's not known with certainty if Zonaras served under John II Komnenos (r. 1118–1143), a