Final answer:
The Tiber River flows through Rome and empties into the Tyrrhenian Sea. It has historically been central to Rome's development and is featured in art like William Kentridge's Triumphs and Laments.
Step-by-step explanation:
The river that flows through Rome before emptying into the Tyrrhenian Sea is the Tiber River. The Tiber has been an important waterway throughout the history of Rome, providing not only a source of water but also a means of transportation and trade. In ancient times, the Tiber was integral to the city's development and economy, though as the city grew, the river eventually became polluted due to the waste from Rome's sewer system and other contaminants. Today, the Tiber remains a central and historic feature of the city, immortalized in artworks such as the Triumphs and Laments mural by William Kentridge, which depicts the rich history of Rome along the river's embankments.