Tayma (; also transliterated Tema)'s a large oasis with a long history of settlement, located in northeastern Saudi Arabia at the point where the trade route between Yathrib (Medina) and Dumah begins to cross the Nefud desert. Tayma's located 264 km southeast of the city of Tabouk, and about 400 km north of Medina. History The oldest mention of the oais city appears as "Tiamat" in Assyrian inscriptions dating as far back as the 8th century BCE. The oasis developed into a prosperous city, rich… (More on Tayma)