The Calvos Oak (Portuguese: Carvalho de Calvos) is a European oak located in the parish of Calvos, in Póvoa de Lanhoso, Portugal.

It is estimated to be about 510 years old, as of 2015 it stands 30 m (98 ft) tall and had a diameter at breast height of 7.62 m (25 ft) with a canopy diameter of 37 m (121 ft).

[1] It is considered to be the oldest oak in the Iberian Peninsula.

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