Complex sentence: She seduced his royal chamberlain, Eugenius, and they plotted to murder her brother and take over the crown; however, their plot was discovered and Eugenius was executed while Honoria was sent to live in a convent in Constantinople.
Split into simpler sentences: She seduced his royal chamberlain, Eugenius, and they plotted to murder her brother and take over the crown. However, their plot was discovered and Eugenius was executed while Honoria was sent to live in a convent in Constantinople.