The first mosque built on the earth

 235. Abu Dhar said: I asked: ´´O Messenger of Allah! Which mosque was built first on the earth?´´ He said: ´´Al-Masjid Al-Haram (the Sacred Mosque at Makkah).´´ I said: ´´Then which next?´´ He said: ´´It was Al-Masjid Al-Aqsa.´´ I said: ´´How long between them?´´ He said: ´´Forty years. And wherever the time of Salat becomes due, then pray for that would be your mosque.´´