No religion did. That is the approximate time of the death of Jesus of Nazareth, but Christianity did not emerge as a religion for some time after that. It was still a small Jewish sect in the mid first century and was not a separate religion until it took enough form to be distinguished as separate in the 2nd century.
Another View:
The death and resurrection of Jesus is dated to circa 30-34 A.D. with 31 A.D. standing on firmer grounds. In this year of the first Pentecost and release of God's Holy Spirit, there were approximately 1,000 followers. Within a year some have this number exploding to 100,000 folllowers. There were obviously enough Christians around in Antioch, circa 40 A.D. to have the name first used for these adherents. See related link below:
The Christian Religion was founded in the area in and near the present day Nation of Israel. There were at least 120 adherents in Jerusalem and 500 in the region of Galilee. There may have been more. It was founded on the Day of Pentecost in either 30 or 33 ad.
Islam was founded in more than 200 years after AD 400.
No, it was founded in Jerusalem in Palestine about the year 33 AD.
Buddhism is an important religion and was founded around 700 AD
33 a.D.
About the year 33 AD.
Catholicism was founded on Pentecost Sunday in the year 33 AD when, upon receiving the Holy Spirit, the apostles began preaching the Gospel.
In Jerusalem on Pentecost Sunday in the year 33 AD.
Around 33 AD in Jerusalem, on the Day of Pentecost.
Islam started in the 6th century, specifically in the year 610 when the Prophet Muhammad received his first revelation in Mecca.
ISLAM
Islam was founded in the 7th century AD in Makkah, Saudi Arabia.