Which one, Boğaziçi University or Basilica Cistern, was built in the 6th century during the reign of Byzantine Emperor Justinian I?
Basilica Cistern:  The cistern, located 500 ft southwest of the Hagia Sophia on the historical peninsula of Sarayburnu, was built in the 6th century during the reign of Byzantine Emperor Justinian I.
i don't know