Definition: Given a text, write a compressed version of it in a single sentence.
Input: For nearly 1,000 years the Church of Haghia Sophia was the greatest church in Christendom, an architectural wonder built by the Byzantine Empire to impress the world.
Output:
For nearly 1,000 years Haghia Sophia, an architectural masterpiece of the Byzantines, was the greatest church in Christendom.