Aqsunqur Mosque, also Ibrahim Agha Mosque or the Blue Mosque, is a historic mosque located in Cairo, Egypt. It was built in 1347 AD by Emir Shams ad-Din Aqsunqur during the reign of the Bahri Mamluk Sultan Al-Muzaffar Hajji. The mosque also serves as a funerary complex, containing the mausoleums of its founder and its principal restorer, Ibrahim Agha al-Mustahfizan. Aqsunqur Mosque was inscribed as a UNESCO World Heritage Site in 1979 as part of Historic Cairo.