Built between 1323 and 1337, and dedicated to St Dominic and St Paul, this was the largest of Constantinople's Latin churches. In the early 16th century, it was converted into a mosque to serve the Moorish exiles from Spain, which is possibly how it got its current name, the 'Arab mosque'. Despite extensive alterations, the design is clearly that of a typical medieval church, complete with apses and a belfry.
Area Istanbul
Open 9am to dusk daily
Admission free
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