Conjunto megalítico da Herdade do Xerez

The Xerez Cromlech, also known as the Xarez Cromlech, is a megalithic complex that is believed to date back to the 5th or 4th millennium BCE. It is situated near the town of Monsaraz, in the municipality of Reguengos de Monsaraz, in Alentejo region, Portugal, close to the Spanish border. The present site of the cromlech is not its original location. Due to the construction of the Alqueva Dam for hydroelectric and irrigation purposes, which led to the flooding of the original site from 2002, it was transferred from an area that is now under water to its present site close to the Orada Convent. The Xerez cromlech was removed from the original site in November 2001 and re-assembled at the present one in June 2004. This was the only monument to be moved, with the dam's reservoir leading to the disappearance of prehistoric art engravings and the Roman-era Castle of Lousa.