The Nuruosmaniye Mosque was built in the years 1748-1755. It is located in the immediate vicinity to the Column of Constantine and the southeast entrance of the Grand Bazaar. It was commissioned by Sultan Mahmud I and completed after his death by his brother Osman III. It was built by Simeon Kalfa, the architect apprentice of Mustafa Ağa.
The Nuruosmaniye Mosque illustrates the first use of European Baroque in Ottoman architecture. It has some architectural features that distinguish it from other major mosques of earlier times, such as the richly ornamented arches on the main wall, the ornate tops of the two minarets and the prayer niche that sticks out from the main room. The horseshoe-shaped forecourt, which has no fountain and is surrounded by twelve columns and fourteen small domes, is especially noticeable. Five rows of windows underneath the beautiful main dome provide a light-flooded interior. This is also the reason for its name Nuruosmaniye, which means “Light of Osman”. The interior of the dome is adorned with the 24th sura (verse of light) of the Qur’an.
The mosque is part of a larger complex consisting of a medrese, a library, a soup kitchen and a tomb in the form of a türbe.