[3] Thanks to its fine collection of ruins, the village of Idanha-a-Velha has some of the country's most important archaeological sites.

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

It was donated to the Knights Templar in the 13th century and still has traces of different ages that attest to permanent occupation by various civilisations.

Monsanto is one of the region's main tourist attractions and offers visitors a unique experience.

The oldest part is also the highest point, where the Knights Templar built a wall with the donjon.