Hovhannavank (Armenian: Հովհաննավանք) is a medieval monastery located in the village of Ohanavan in the Aragatsotn Province of Armenia. The oldest part of the monastery is the single nave basilica of St. Karapet (i.e. Holy Forerunner, John the Baptist) that was founded at the beginning of the fourth century by St. Gregory the Enlightener, who baptized Armenia into the world's first Christian nation. The wooden roof of the early church was replaced in 554 AD with a thatch cover, and the basilica itself underwent profound renovation between 1652 and 1734.