In the 1970s and 1980s scholars like John C. Wilkinson believed by virtue of oral history that in the 6th century BC, the Achaemenids exerted control over the Omani peninsula, most likely ruling from a coastal centre such as Suhar. Central Oman has its own indigenous Samad Late Iron Age cultural assemblage named eponymously from Samad al-Shan. In the northern part of the Oman Peninsula the Recent Pre-Islamic Period begins in the 3rd century BC and extends into the 3rd A.D. century. Whether or not Persians brought south-eastern Arabian under their control is a moot point, since the lack of Persian finds speak against this belief. M. Caussin de Percevel suggests that Shammir bin Wathil bin Himyar recognized the authority of Cyrus the Great over Oman in 536 B.C.