This basilica, considered the epitome of Byzantine architecture, was completed in 537 AD by Emperor Justinian I. It was the largest cathedral in the world for one thousand years, and it has been said to have "changed the history of architecture." It is known as

Responses
A the Vatican.the Vatican.
B the Pantheon.the Pantheon.
C the Hagia Sophia.the Hagia Sophia.
D St. Peter's Cathedral.

C the Hagia Sophia.

C) the Hagia Sophia

The correct answer is C) the Hagia Sophia.

To arrive at the correct answer, it is important to understand the given information about the basilica. The first clue is that it was completed in 537 AD by Emperor Justinian I. The second clue is that it was the largest cathedral in the world for one thousand years. The third clue is that it is considered the epitome of Byzantine architecture and has been said to have "changed the history of architecture."

Given these clues, we can eliminate options A) the Vatican, B) the Pantheon, and D) St. Peter's Cathedral.

The Vatican is the seat of the Roman Catholic Church, but it was not completed in 537 AD and is not associated with Byzantine architecture.

The Pantheon is a well-known ancient Roman temple, but it was also not completed in 537 AD and doesn't fit the description of being the largest cathedral for one thousand years.

St. Peter's Cathedral, located in Vatican City, is a famous basilica, but it was also not completed in 537 AD and it is not primarily associated with Byzantine architecture.

This leaves us with option C) the Hagia Sophia. The Hagia Sophia is a historic religious building located in Istanbul, Turkey. It was completed in 537 AD by Emperor Justinian I and served as an Eastern Orthodox cathedral for over 900 years. It is renowned for its grand architectural design, combining elements of Byzantine, Ottoman, and Roman influences. The Hagia Sophia is considered a masterpiece of Byzantine architecture and has had a significant impact on architectural history.