Senntisten (derived from the Hungarian phrase, Szent Isten, meaning "Holy God"), also known as "Holy City", was the capital city of the Zarosian Empire, which existed during the Second and Third Ages. According to modern archaeological findings, Senntisten occupied the rough area east of modern-day Varrock and parts of Silvarea, making it one of the largest known cities in history.
Senntisten was established during the early Second Age when Zaros arrived in Gielinor from another world. The Zarosian Empire rapidly expanded until it encompassed most of what is now Misthalin, Asgarnia, the Wilderness, and northern Morytania.
The establishment of Senntisten, along with the rest of the Empire, greatly disrupted the trade and movement of those nations established during the Second Age. The Kharidian Desert, Hallowvale, Eastern Sea, and tribesmen of Misthalin and Asgarnia were kept greatly separated by the presence of the Empire, which proved extremely dangerous to outsiders.
When Zaros was overthrown at the end of the Second Age, Senntisten continued to remain loyal to him, and was defended from the forces of the other gods for 100 generations, until it finally fell to the combined attacks of Zamorak and Saradomin. Sometime after the fall of the resistance Zamorak established himself as ruler, and ruled the city by 3740. Some time between 3740 and 3804 the Saradominists tried to cover up evidence of Zaros' existence by destroying the city, and building Saranthium above its eastern ruins. Saranthium, despite its vibrant beginnings, was destroyed by unknown causes in the early Fourth Age.
Although Varrock now exists where Senntisten's western walls once stood, the eastern portions of the city are currently being excavated by the Varrock Museum. During the Digsite Quest, players discover a cavern beneath the ruins where the remains of a Zarosian altar still exist. The ruins still appear to possess some dark energy, as evidenced by Tolna's claims during A Soul's Bane.
Those with the knowledge of Ancient Magicks can utilise a Zarosian spell, Senntisten Teleport, to teleport here, provided they have 60 Magic, 2 Law runes and one Soul rune. The Digsite Pendant, which uses the same teleportation channel, also can be used.