Saint Sava (Serbian Cyrillic: Свети Сава, Serbian Latin: Sveti Sava, Serbian pronunciation: [sʋɛ̂ːtiː sǎːʋa], Old Church Slavonic: Свѧтъ Сава (cyr), ⰔⰂⰤⰕⰟ ⰔⰀⰂⰀ (glag), Greek: Άγιος Σάββας, 1169 or 1174 – 14 January 1236), known as the Enlightener, was a Serbian prince and Orthodox monk, the first Archbishop of the autocephalous Serbian Church, the founder of Serbian law, and a diplomat. Sava, born as Rastko Nemanjić (Serbian Cyrillic: Растко Немањић), was the youngest son of Serbian Grand Prince Stefan Nemanja (founder of the Nemanjić dynasty), and ruled the appanage of Zachlumia briefly in 1190–92. He then left for Mount Athos, where he became a monk with the name Sava (Sabbas). At Athos he established the monastery of Hilandar, which became one of the most important cultural and religious centres of the Serbian people. In 1219 the Patriarchate exiled in Nicea recognized him as the first Serbian Archbishop, and in the same year he authored the oldest known constitution of Serbia, the Zakonopravilo nomocanon, thus securing full independence; both religious and political. Sava is regarded as the founder of Serbian medieval literature.[4][5][6][7][8]