Pantheon
In some ways Roman religion is a lot like Greek religion, but in other ways it is very different. Like the Greeks, the Romans thought that there were many gods, and that these gods each controlled different parts of the world: storms, the ocean, marriage, blacksmithing, and so forth.
The Romans were particularly interested in power, and much less interested in balance than the Greeks.
The chief of the gods, for the Romans, was Jupiter. His name is related to the name of the Greek god Zeus, and Jupiter is similar to Zeus in many ways. They are both sky gods who throw lightning bolts when they are angry.
At first the Roman gods were separate from Greek gods, although distantly related because both groups worshipped Indo-European gods. Later on, though, as the Romans met more Etruscans and Greeks and began to admire the Greeks more and more, the Romans adopted many Greek gods as their own and began to worship them as well. One early example is the twin gods Castor and Pollux.
For the Romans, as well, their emperors were gods, or something very close to gods, depending on who you asked. Generally in the eastern part of the Roman Empire, in Egypt and Western Asia, people worshipped the emperors as gods. But in the western part, in Europe, people worshipped only the emperor's guardian angel or something like that, not the emperor himself.
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