The vast majority of modern-day ethnic Assyrians remain adherents of these ancient indigenous Eastern Rite churches.
The current church's doctrine and tradition is a continuation of the spiritual revival movements that took place in Western Iran during the 1930s.
In 1940, with great diligence and personal sacrifice a young Assyrian pastor, named Tooma Nasseri[1] began his evangelical ministry throughout Western Iran and built churches and established congregations in villages, towns, and major metropolitan cities in Iran.
[2] Currently, the Assyrian Pentecostal Church has several congregations in California, Illinois, Canada, Australia, Austria, and Iran.
Thus, the Church's name originates from the biblical passages contained within the Acts of the Apostles which refers to the day of Pentecost.