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Historic

Kasım Ağa Mosque, Istanbul

Also known as: Kasım Ağa Mosque, Istanbul Fatih, İstanbul, Türkiye Salma Tomruk Caddesi, Derviş Ali Mahallesi, İstanbul, 34087
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mosque in İstanbul, Turkey

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This text was compiled from sourced information with AI assistance and has not yet been reviewed by an editor. Please report any errors.

The Kasım Ağa Mosque (Kasım Ağa Mescidi) stands in the Derviş Ali neighbourhood of Istanbul's Fatih district, on Salma Tomruk Caddesi. It is a former Byzantine building that was converted into a mosque under the Ottomans, and it is also known as Kâsım Bey Mescidi. Its architecture combines Byzantine and Ottoman elements. The structure's original function is not firmly established, but it may have been part of a monastery whose main church is the present-day Odalar Mosque.

From Wikipedia

Kasım Ağa Mosque (Turkish: Kasım Ağa Mescidi; also Kâsım Bey Mescidi, where mescit is the Turkish word for a small mosque) is a Byzantine building converted into a mosque by the Ottomans in Istanbul, Turkey. Neither surveying during the last restoration nor medieval sources have made it possible to find a satisfactory answer as to its origin and possible dedication. It is probable that the small building was part of the Byzantine complex and monastery whose main church was the building known in Ottoman era as the Odalar Mosque, whose dedication is also uncertain. The edifice is a minor example of Byzantine architecture in Constantinople.

Source: Wikipedia, article “Kasım Agha Mosque”; quoted unchanged under the CC BY-SA 4.0 licence. Read more on Wikipedia ↗ · CC BY-SA 4.0

Qibla direction
N 152°
clockwise from north
Calculated from the building's coordinates to the Kaaba; not a device compass.
Coordinates 41.02900, 28.93900
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Sources
Last updated: 21 October 2026

Location

Nearby mosques

Kefeli Mosque Fatih · 0.2 km away Vasat Atik Ali Pasha Mosque Fatih · 1512 · 0.5 km away Pammakaristos Church Fatih · 0.6 km away Add a mosque in this area Help the atlas grow

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Kasım Ağa Mosque, Istanbul