sentences:  Several of these have been unearthed near Adichanallur, Kaveripoompuharpattinam and Mahabalipuram, and the construction plans of these sites of worship were shared to some detail in various poems of Sangam literature.One such temple, the Saluvannkuppan Murukan temple, unearthed in 2005, consists of three layers.The lowest layer, consisting of a brick shrine, is one of the oldest of its kind in South India, and is the oldest shrine found dedicated to Murukan.