The Great Mosque or the Great Mosque of Algiers is an architectural masterpiece located in the center of the state of Algiers, and is the largest mosque in Algeria and the third largest mosque in the world. The mosque was characterized by a unique architectural design on the Andalusian character, where the decorations, inscriptions, arches and pointed ceilings, and it was decorated from the inside with Islamic artworks of beautiful Arabic manuscripts written on marble and wood from the verses of the Holy Qur’an, while the floor of the prayer hall was furnished with a turquoise carpet on the Algerian character with floral patterns. traditional. The building of the mosque includes a prayer hall, a huge library and centers for memorizing the Holy Quran.