Answer:The problem was that Charles II did not have an heir. The French wanted Duke Philip to succeed the throne while the Hapsburgs recommended Archduke Charles to the throne. Both sides had firm claims and this would affect the balance of power in the area.
Option 3: He supported the building of the Hagia Sophia.
Justinian I was one of the outstanding rulers of the Byzantine Empire, he governed from 527 until he died in 565. During his reign, he expanded the Empire and many great monuments were built including the famous Hagia Sophia in 537, which was originally constructed as a church. The church was the largest of its time and considered the greatest architecture building of the Byzantine Empire (330-1453)
