Stefan Nemanja (ca 1113 – 13 February 1199) is the Grand Prince (Veliki Župan) of the Serbian Grand Principality (Rascia) from 1166 to 1196, an heir of the Vukanović dynasty that marks the beginning of a greater Serbian realm (he is the founding father of the Nemanjić dynasty).

He is remembered for his contributions to Serbian culture and history, being the founder of the powerful Serbian state that would evolve into the Serbian Empire, and the national church.

He is the father of Stefan Nemanjić, the first King of Serbia, and of Saint Sava, the first archbishop of the Serbian Orthodox Church.

In 1196, he abdicates in favor of his son Stefan, and goes to Mount Athos, where he becomes a monk and takes the name of Simeon.

Together with his son Sava, Simeon builds the Hilandar Monastery in 1198-1199, which becomes the cradle of the Serbian Church.

After his death, Stefan Nemanja is canonized by the Serbian Orthodox Church under the name Saint Simeon the Myrrh-streaming after numerous alleged miracles following his death.