A UNESCO World Heritage Site, the Tarxien Temples is one of six inscribed as ‘The Megalithic Temples of Malta’ in the World Heritage List. The site consists of a complex of four megalithic structures built between 3600 and 2500 BC and re-used between 2400 and 1500 BC. Discovered in 1913 by local farmers, the site was extensively excavated between 1915 and 1919, with a number of minor interventions carried out in the 1920s, by Sir Themistocles Zammit, Director of Museums at the time. An elevated walkway was completed in 2012 giving the opportunity to view the prehistoric remains from a unique viewpoint.