The outstanding Armenian poet Yeghishe Charents called the Gok-Cami Mosque (Blue Mosque) the «Blue Diamond» of Yerevan. It was built in the mid-18th century by the Khan of the Erivan Khanate, Hoseyn Ali Khan Qajar. Today, the Blue Mosque of Yerevan is one of the main attractions of the city and the only functioning Muslim prayer building in the country.