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Throughout its various incarnations as a church, an Orthodox cathedral, a mosque, and a museum, this magnificent structure has dominated Istanbul\'s skyline.

Throughout its various incarnations as a church, an Orthodox cathedral, a mosque, and a museum, this magnificent structure has dominated Istanbul\'s skyline.

Throughout its various incarnations as a church, an Orthodox cathedral, a mosque, and a museum, this magnificent structure has dominated Istanbul\'s skyline.

Throughout its various incarnations as a church, an Orthodox cathedral, a mosque, and a museum, this magnificent structure has dominated Istanbul\'s skyline.

Throughout its various incarnations as a church, an Orthodox cathedral, a mosque, and a museum, this magnificent structure has dominated Istanbul\'s skyline.

The magnificent mosaics and fantastic frescoes in this ancient Byzantine church make it well worth a visit.