Roman (adjective)

1. Relating to ancient Rome or its people or culture.
2. Relating to the Roman Catholic Church.

Origin:

Mid 16th century: from french, from latin romanus "roman".

Examples:

1. Roman architecture is characterized by the use of arches and columns.
2. Roman law is the basis for many legal systems.
3. Roman catholic is the largest branch of Christianity.
4. The Roman empire was one of the most powerful empires in history.
5. The Roman senate was a powerful political institution.