Saint Sava, born Rastko Nemanjić, was a 12th-century Serbian prince who became a prominent monk and the first archbishop of the Serbian Church. As the youngest son of Stefan Nemanja, he initially ruled Zachlumia before choosing a monastic life on Mount Athos, where he founded the Hilandar monastery. A skilled diplomat, writer, and hagiographer, he played a fundamental role in shaping the religious and legal identity of the Serbian people through his extensive literary and legislative work.