Hagia Sophia

The Hagia Sophia is a building in Istanbul. It has been a Christian church, an Eastern Orthodox church, a mosque and a museum. It is considered to be one of the most beautiful landmarks on Earth.

Julian Bashir had visited, or had seen images of, the Hagia Sophia. As a result of his genetic enhancements, he was able to construct a mental replica of it entirely within his mind. (Star Trek: Deep Space Nine - Mission Gamma: Cathedral)