Question not properly put.
A republic is a system in which ultimate political authority is vested in the people.
The ultimate authority lies with the people. In Islam, the ultimate authority lies with Almighty Allah.
A police officer who assumes control of an intersection would have ultimate authority over that intersection.
Popular sovereignty asserts that people hold ultimate authority.
No, the Orthodox Church--like the Catholic Church--believe the Church itself to be the ultimate authority on their beliefs. Protestants, due to placing the Holy Bible as their ultimate authority, are divided into thousands & thousands of sects.
The Magesterium has the ultimate teaching authority in the Catholic Church.
the king
Jerusalem
The Chruch
the bible :)
Congress.