Complex sentence: In the tenth century, Emperor Romanos Lekapenos erected near the Chalkè a chapel dedicated to Christ Chalkites, the name of the image of Jesus that adorned the main entrance of the Chalkè.
Split into simpler sentences: In the tenth century, Emperor Romanos Lekapenos erected near the Chalkè a chapel dedicated to Christ Chalkites. So was called the image of Jesus which adorned the main entrance of the Chalkè.