The Great Mosque of Gaza also known as the Great Omari Mosque is the largest and oldest mosque in the Gaza Strip, located in the Daraj Quarter of the Old City in Downtown Gaza City. 

Believed to stand on the site of an ancient Philistine temple, the site was used by the Byzantines to erect a church in the 5th century, but after the Muslim conquest in the 7th century, it was transformed into a mosque.