Mezquita de Pertevniyal Valide Sultan

The Pertevniyal Valide Sultan Mosque, also known as the Aksaray Valide Sultan Mosque, is an Ottoman imperial mosque in the Aksaray neighbourhood of Istanbul's Fatih district. It stands at the intersection of Ordu Street and Atatürk Boulevard and is named after Pertevniyal Sultan. The architect was Pietro Montani, and the building belongs to the Ottoman architectural tradition. Beside it stands Pertevniyal High School, which was also built on the order of Pertevniyal Sultan. The mosque is reported to draw about 400 to 500 worshippers at daily prayers and more than 2,500 at Friday prayers.

The mosque was built in 1871 by the architect Pietro Montani. The neighbouring Pertevniyal High School was commissioned by Pertevniyal Sultan in 1872.

During the Ottoman period Aksaray was a major commercial centre. The area, now a busy urban thoroughfare, was then known for its beauty, with many gardens and orchards. The site is regarded as having been of particular significance to the valide sultan and the royal family.