Birzartan I Amarienzuir (1024-1245) was a Sun Elf governor of Imulušes (1135-1170) under the Jexisian Empire and the first King of Birsartanšes (1170-1245).
First son of Amarien of Imulušes, he was given his name in honor of the Bahari hero Birsartan the Secretary. Fate had him follow the path of his namesake by making him interested in affairs of state and administration, helping his mother to rule until her death in 1135. In the chaos that followed the death of Jaher, he became acquainted with Jexis and became a close ally while she gathered forces waiting for Jaerel's return. After the reunification of Bulwar, she granted him the position of personal secretary, claiming that as the daughter of Surael Reborn, she could count on Birsartan reborn to handle administration of the Empire.
He accompanied her to Anbenncost during the Decade of Masks while leaving the familial lands to his brother Eletar to rule in his absence. There he crafts a system of empire-wide examinations whose aim would have been to create a skilled bureaucrat force in service of Jexis. His plan did not go through because of the general instability of the Empire and the paranoia of the Burned Empress. He was eventually sacked of his post and sent back to Bulwar notably after having clashed with Elizar the Blooded.
It is from his palace in Birsartansbar that he learnt the death of Jexis and the bid for power of Elizar. Like most of the Bulwari governors he decided to fight Elizar and proclaimed himself King of Birsartanšes. He fought the last Human king of Baharkand that supported the Bastard Empire and put his brother Eletar on the throne as a subservient Akal.
He died in 1245, being succeeded by his son Arantir.