The tolerance level of different religions in Rome was at first very high, until it came to be that there were more religions coming to be in Rome.
For example, the corrupt-with-power emperor Nero tried to blame a great fire on the Christians, saying that the Christians hated all human beings and were trying to provoke the end of the world, as they foretold.
Hadrian, another emperor, despised Jewish peoples, and in doing so, killed many if them.
The twelve tables were laws consisting of 1. Courts and trials 2. Trials (continued) 3. Debt 4. Family rights 5.legal guardians and inheritance 6. Gaining and possessing property 7. Land rights 8. Unlawful acts and penalties 9. Laws on government 10. Laws on religion 11. And 12. Additional laws.
I think that the most important thing I learned about ancient Rome was that the ancient Romans were vastly dependent on one another, being that many of them were poor, and people like Julius Caesar tried to help them and, in doing so, succeeded greatly.