Ostra was an ancient Roman town near the modern town of Ostra Vetere.Antica città romana di Ostra https://www.marcheology.it/en/discover/poi/antica-citt-romana-di-ostra-90/ The Roman town was inhabited from the 3rd century BC until the 6th century AD.

History

Pliny the Elder mentions Ostra with another ancient town, Suasa, west.Pliny the Elder Natural History (Mayhoff) 3.114.2 http://latin.packhum.org/loc/978/1/253/1119-1124 Neither town survived beyond the classical period. Though Ostra is little mentioned by ancient authors, excavations there have brought to light remains of various buildings and several inscriptions.

See also

Archaeological Park of Urbs Salvia Potentia (ancient city) Ricina Sentinum Suasa Septempeda

References