Michael Glykas or Glycas (Greek: Μιχαὴλ Γλυκᾶς) was a 12th-century Byzantine historian, theologian, mathematician, astronomer and poet. He was probably from Corfu and lived in Constantinople. He was a critic of Manuel I Komnenos, and was imprisoned and blinded due to his participation in a conspiracy against the emperor. He is also identified by modern scholarship with Michael Sikidites (Μιχαὴλ Σικιδίτης), who was condemned as a heresiarch in 1200.
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