Abu Delf Mosque, Historical mosque in Samarra, Iraq.

Abu Delf is a mosque in Samarra featuring a distinctive spiral minaret on its northern side that rises 32 meters high. The minaret's entire surface is covered with intricate brickwork patterns that create its characteristic appearance.

Caliph Al-Mutawakkil ordered its construction in 859 as part of expanding Islamic architecture in the city. The project was part of a larger effort that helped establish Samarra as an important religious center.

The name Abu Dulaf was attached to the mosque in later centuries, honouring al-Qasim ibn Isa al-Ijli, a Samarra native and commander under Caliph Harun al-Rashid. The spiral minaret, set outside the northern wall, repeats the form of the Malwiya of the Great Mosque of Samarra.

The mosque stands about 15 km north of Samarra in Saladin Governorate, within the Samarra Archaeological City listed by UNESCO in 2007. The spiral minaret sits outside the outer wall on the northern side, so approach from that direction to see it whole. The site is an archaeological ruin with partial preservation; ploughing and cultivation have damaged parts of it.

The minaret design influenced later structures such as the Mosque of Ibn Tulun in Cairo. This spread of architectural styles demonstrates how building ideas traveled between different Islamic regions over time.