Original: Olbia ( or , locally , ; Sardinian name : Terranoa , Gallurese : Tarranoa ) , is a town of approximately 54,000 ( 2009 ) inhabitants in northeastern Sardinia ( Italy ) , in the Gallura sub-region .
Simplified: Olbia ( Sardinian : Terranoa , Gallurese : Tarranoa ) is a city in the region of Sardinia .