Mount Athos is a self-governing part of the Greek State, located on the peninsula of Athos, Halkidiki, in central Macedonia. It includes twenty Sacred Monasteries and other monastic foundations and is unofficially designated as "Autonomous Monastic State" Since 1988, it has been listed as World Heritage Sites. The prevalence of the name "Mount Athos" seems to have taken place in the first half of the 12th century, namely in a golden-writing document of Emperor Alexios I Komnenos to the Holy Monastery of Megisti Lavra in 1144, which is definitively and officially recognized and the new name says: "From now on, the name of Athos is called Mount Athos, in spite of everything". In later imperial and other documents it is referred to as "The Mount Athos of Mount Athos". Mount Athos is governed by a special legal regime, which consists of a set of provisions of the Constitution, International Treaties, European Union law and the rest of the domestic law, with the most important regulatory text being the Charter of the Holy Mountain, which administratively organizes the area.