IdanhaaVelha is a village in the civil parish of Monsanto e IdanhaaVelha, in the municipality of IdanhaaNova, central eastern Portugal, and the site of ancient Egitânia, a former bishopric.

It stands in a place where a Roman city located along the Ponsul River once lay, the regional capital of Civitas Igaeditanorum (1st century BC) under the Romans and later the episcopal seat during occupation by the Suebi and Visigoths.