They were Pagans, and believed a variety of religions; the main one was based on classical Greek religion but they also worshipped their emperors and followed "foreign" religions such as Egyptian and Persian religions.
Origanially their native Roman beliefs (conquerored peoples, excluding the Jews, practiced it in conjuction with their own faith) but later the offical religion became Christianity. Follow this http://www.historyforkids.org/learn/romans/religion/
Christianity
There were no "pagans" in ancient Rome: Pagan is a term used by Christians/Catholics to reference religious traditions that were not sanctioned by the Church, which would have included the polytheistic ancient Romans themselves.
The Romans had their own religion: Roman religion. It was a polytheistic (it had many gods) pagan religion, like all the religions of antiquity. In late antiquity the Roman Empire became Christian.
At first they thought of it as blasphemy to their current religion, then when Constantine came into power( a loooong time later) in order to end the persecution of Christians and to unite the nation under one religion he made it the Nations religion.
The roman religion consisted of a large amount of Gods. Christianity has one God. The Romans didn't like that.
It isn't that they didn't like it, the Romans allowed freedom of religion as long as you showed respect and worship to the emporer and the Roman gods. When the early Christians refused, the Romans were hostile. Also, the Romans believed that Jesus would lead a revolt against them, because that was what the messiah was fortold to do.
Origanially their native Roman beliefs (conquerored peoples, excluding the Jews, practiced it in conjuction with their own faith) but later the offical religion became Christianity. Follow this http://www.historyforkids.org/learn/romans/religion/
Christianity
mostly Christianity
Christianity is a religion regardless of what country you are in worldwide. Though in countries like Saudi Arabia, and Iran Christain are persecuted.
Leif Erikson was a Norse explorer who lived in the 10th century, before the widespread conversion to Christianity in Scandinavia. He would have followed the Norse pagan religion, which included belief in gods like Odin, Thor, and Freyja.
There were no "pagans" in ancient Rome: Pagan is a term used by Christians/Catholics to reference religious traditions that were not sanctioned by the Church, which would have included the polytheistic ancient Romans themselves.
Christianity, Islam, and Judaism are the main ones. Buddhism focuses on Buddha
I think it is something like Christianity.
Sikhism is not a who. It is a religion like: Christianity, Islam, Judaism etc.
It's catholic so very much like Christianity