Which terminology is associated with the largest church in Christianity during Justinian's era?

The Church of the Holy Wisdom, also known as Hagia Sophia, is indeed associated with the largest church in Christianity during Justinian's era. Built under the direction of Emperor Justinian I in the 6th century, it became an architectural marvel of its time, symbolizing the power and grandeur of the Byzantine Empire. Its design features a massive dome and is noted for its innovative structural techniques and stunning mosaics, representing both the triumph of Christian architecture and the cultural achievements of the Byzantine period. The church served as the central religious site of Eastern Orthodox Christianity for nearly a thousand years before being converted into a mosque following the Ottoman conquest of Constantinople. This historical significance and architectural innovation make it the correct answer to the question regarding the terminology associated with the largest church during this era.