The Al-Hussain Mosque (Arabic: مسجد الإمام الحسين; Egyptian Arabic: جامع سيدنا الحسين) is a mosque built in 1154 (alternative transliterations include Husayn, Hussain, Husayn, and Hussayn; also, the mosque's name is prefixed by the honorific title Sayyidna). The mosque is located in Cairo, Egypt, near the Khan El-Khalili bazaar. It is considered to be one of the holiest Islamic sites in Egypt.