Marmara Denizi, also known as the Marmara Sea, is a body of water that connects the Aegean and Black Seas. Synonyms for the Marmara Denizi include the Sea of Marmara, Marmara Gulf, and Propontis. The name "Marmara" is derived from the Greek word for "marble," as the sea is known for the marble that is found in its waters. Its strategic location has made it an important commercial and transportation hub throughout history. The Marmara Denizi is also home to various types of marine life and is a popular tourist destination for its scenic beauty and bustling cities along its shores.