What characteristics show that the Hagia Sophia is a composite of Greek and Christian cultures?

The Hagia Sophia exemplifies a blend of Greek and Christian cultures through its architectural design and decorative elements. Its massive dome, inspired by Roman engineering, reflects Greek architectural innovation, while its lavish mosaics and iconography showcase Christian themes and artistry. The use of columns and arches draws from classical Greek structures, harmonizing with Christian symbols, such as the cross and images of saints. This fusion illustrates the historical interplay between Hellenistic and Byzantine influences in its cultural and religious significance.