Sogmatar, Şanlıurfa is 53 kilometers from Harran. It is located in Yağmurlu village, where there are important springs in the Tek Tek mountains. Tek Tek Mountains, which have important Neolithic centers such as Karahantepe, Harbetsuvan, and Kurt Tepesi, also have a cult center belonging to the Moon God Sin. The region is a cult center dedicated to the Moon God Sin in the Tektek Mountains region of the Harranians during the Abgar Kingdom Period. In the Sogmatar Cult center; There is a cave where the moon god Sin is worshiped (Pognon Cave), and a hill (Sacred Hill- Turkish: Kutsal Tepe) on the slopes of which there are reliefs of the god and inscriptions engraved on the ground. Also, there are 6 square and round planned mausoleums, the inner castle, and many rock tombs carved into the main castle. Although the Ancient City of Sogmatar is dated to the 2nd century AD, researches show that the history of the city dates back to 2000 BC. Sogmatar was founded by the people who fled from the region due to the intense attacks of the Parthians (Iranians) in the Urfa region, especially in 165 AD, and preserved its cult center feature until the Islamic Period. Although the name of the moon god in Mesopotamian civilizations varies from culture to culture, it is mostly seen as “Sin” and “Nanna.