Near what city did Christianity first spread?

Rome

Explanation:

christianity spread to places like rome, greece, syria, and armenia at the end of the first century, starting the spread of christianity

Christianity began in the 1st century AD after Jesus died, as a sect of Jewish people in Judea, but quickly spread throughout the Roman empire. Despite early persecution of Christians, it later became the state religion. In the Middle Ages it spread into Northern Europe and Russia.