There's Balkan peninsula separating Italy and Turkey (former Ottoman Empire) but the sea is called the Mediterranean.
When the Ottoman Empire controlled the Balkans, the Adriatic Sea separated the Italian states like Venice, Tuscany, the Papal States, and the Kingdom of the Two Sicilies from the Ottoman Empire.
The sea between Italy coasts and Sardinia isle is the Tyrrhenian Sea.
Bonifaco straits
The Mediterranean.
The Adriatic Sea :)
The only ocean that the Ottoman Empire touched was the Indian Ocean. However, the Ottoman Empire also touched the Black Sea, the Mediterranean Sea, the Red Sea, the Gulf of Aden, and the Persian Gulf.
Italy
Adriatic sea
There are several countries and a sea between Italy and Serbia.
The Tyrrhenian Sea is a portion of the Mediterranean Sea. The Tyrrhenian Sea separates the island of Sardinia from Italy.
The Smelly Sea.
The Adriatic Sea separates the Italian and Balkan peninsulas.
Italy and [The former country of] Yugoslavia are separated by the Adriatic Sea
South of Italy and Greece is Africa. The Mediterranean Sea separates them.
The Adriatic Sea lies east of Italy. It is part of the Mediterranean Sea and it separates Italy from the Balkan peninsula.
The Ottoman Empire