Kaisar Ioannes Rogerios attempted a coup against Manuel I but was betrayed by his wife

Summary:
Before Manuel I could reach Constantinople, his sister Maria realised that her husband, the kaisar Ioannes Rogerios Dalassenos, was trying to usurp the throne. He was making plans with Robert, prince of Capua, who had been driven out of Southern Italy by Roger II of Sicily, and was in Constantinople with many adherents. Maria tried to stop them but failed, so she told Manuel’'s agents, who lured Ioannes to a suburban estate and detained him 
Dates:
1143 
Ioannes Rogerios Dalassenos, kaisar (Ioannes 306)
  • Before Manuel 1 reached Constantinople he set his eyes on the throne and his supporters included Robert of Capua (Robert 17003); his wife (Maria 168) failed to stop him, but told Manuel’'s agents, who lured him to a suburban property (:) τῇ βασιλείᾳ ἐποφθαλμίσαντα Kinnamos 37.5-38.5
Maria Komnene (Tzousmene), daughter of Ioannes II (Maria 168)
  • Realised, before the emperor Manuel 1 reached Constantinople, that her husband (Ioannes 306) was aiming at the throne; when he rejected her objections, she told Manuel’'s agents, who lured Ioannes to a suburban property (:) τῇ βασιλείᾳ ἐποφθαλμίσαντα Kinnamos 37.5-38.5
Robert II of Sorrento, prince of Capua (Robert 17003)
  • Having been driven out of Capua by the Sicilian Roger 17001, he now vainly conspired with the kaisar Roger (Ioannes 306) to take the imperial throne (:) Kinnamos 37.9-18