Al-Khadra — the Green Mosque, known locally and historically as the Green Church — is one of the oldest surviving religious structures in the Tikrit area. The building's popular name reflects a history that predates Islam in the region: it is believed to occupy the site of an early Christian church, and the name stuck through subsequent conversions and rebuildings.
The structure that stands today is modest and shows the marks of age and recent conflict. It remains a functioning religious site rather than a formal monument or museum. Its significance is historical rather than architectural — it is a rare physical continuity in a city where much has been destroyed or altered beyond recognition.