He ruled at a troubled time during which Armenia had to choose between their neighbors Byzantines and Persians along with their new conquerors the Arabs.
Catholicos Nerses III received the title of the Builder due to the grand construction works he undertook during his reign.
The most important ones were the construction of a chapel over the pit of imprisonment of St. Gregory the Illuminator at Khor Virap (which was replaced a thousand years later by the current church) and the magnificent cathedral of Zvartnots.
This article about an Armenian Apostolic patriarch or bishop is a stub.
You can help Wikipedia by expanding it.This biographical article about an Armenian religious figure is a stub.