Emir Abdelkader Mosque, also known as the Great Mosque of Constantine, is a grand mosque located in the city of Constantine, Algeria. The mosque is named after the famous Emir Abdelkader, a leader and hero of the Algerian resistance movement against French colonization in the 19th century.

The mosque was built in the 1990s and opened in 1994. It is one of the largest mosques in Algeria and in North Africa, with a capacity to accommodate up to 15,000 worshippers at a time. The mosque's architecture is a blend of traditional and modern styles, with a large central dome and four minarets. The interior of the mosque is decorated with intricate tilework, calligraphy, and stained glass windows.

The mosque is a symbol of both Islamic faith and Algerian identity. It serves as a place of worship and also hosts cultural and educational events. It has become a popular tourist attraction in Constantine, drawing visitors from around the world who are interested in its architecture and the history of the Algerian resistance movement.