"Sert\u00E3 (Portuguese pronunciation: [s\u0268\u027E\u02C8t\u0250\u0303]) is a municipality in Castelo Branco District in Portugal. The population in 2011 was 15,880, in an area of 446.73 km\u00B2.The present mayor is Jos\u00E9 Paulo Barata Farinha, elected by the Socialist Party. The municipal holiday is the June 24."@en . . .