Little Hagia Sophia
Little Hagia Sophia was built under Emperor Justinian in the 520s or 530s as the Church of Saints Sergius and Bacchus and became a mosque in the early 16th century, under Bayezid II. Its domed octagonal hall, ringed by a two-storey colonnade with carved capitals, is among the oldest Byzantine buildings in Istanbul; it is a working mosque, closed to visitors during prayers.
Nearby
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Hagia Sophia
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Grand Bazaar
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Free entry
Free entry — no ticket needed