Ostra
Ὄστπα
Ostra (Ὄστπα: Eth. Ostranus), a town of Umbria, in the district once occupied by the Senones mentioned both by Pliny and Ptolemy (Plin. Nat. 3.14. s. 19; Ptol. 3.1.51), but of very uncertain site. [UMBRIA].
From William Smith (ed.), Dictionary of Greek and Roman Geography. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.