The Tuanku Mizan Zainal Abidin Mosque, or Iron Mosque (Malay: Masjid Tuanku Mizan Zainal Abidin or Masjid Besi) is the second principal mosque in Putrajaya, Malaysia after Putra Mosque. It is located in Putrajaya's Precinct 3, opposite the Palace of Justice. Construction began since April 2004 and was fully completed on August 2009. It was officially opened by the 13th Yang di-Pertuan Agong, Tuanku Mizan Zainal Abidin on 11 June 2010. The mosque was built to cater to approximately 24,000 residents including the government servants working around the city center as well as areas within Precincts 2, 3, 4 and 18. Tuanku Mizan Zainal Abidin Mosque's area is twice that of Putra Mosque, which is located 2.2 kilometres north.