The present buildings are based around a fourth-century structure that is said to have been commissioned by St. Helen, mother of Constantine the Great (founder of Constantinople and the leader who converted the Roman Empire to Christianity), and the sixth-century chapel uses columns from an earlier Roman temple.
The mother of Constantine the Great commissioned the structure.
Nobody knew who the mother of Constantine was.
I apologize for not being there to help.
Some women are playing music outside.
His mind rejected the nonsense.
She stared at her reflection in a glass while standing.
I did not write any comments or reports during the war.
He did not care about what was going on in the locked room.