I thought his behavior was complete madness.

Caligula was a Roman emperor, and his reign is known for violence and madness.

His reign was a time of peace and prosperity.

His reign brought peace and prosperity.

He can write Japanese using the Latin alphabet.

The Romanization of Japanese is very convenient for foreigners.

The emperor stands at the highest position in the country.

He believes that resorting to violence is never acceptable.

I am planning to go to Rome next week.

He is my best friend.