Senntisten (derived from the Hungarian phrase, Szent Isten, meaning Holy God) was the capital city of the Zarosian Empire, which existed during the Second and Third Ages. According to modern archaeological findings, Senntisten stretched from the River Salve in what is now eastern Misthalin to the fortress of Paddewwa where Edgeville now exists, making it the largest known city in history.
Senntisten was established during the early Second Age when the deity 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. Under aggressive generals such as Lord Drakan and Thammaron, Senntisten was firmly established as the capital of the Zarosian Empire, despite its location outside the Wilderness where the most concentrated development took place.
The establishment of Senntisten, along with the rest of the Empire, greatly disrupted the trade and movement of those nations established during the First Age, prior to Guthix's departure. The Kharidian Desert, Hallowland, Eastern Sea, Myriad, 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 the deity. During the God Wars, Senntisten held out against countless invasions for thousands of years, including a campaign led by Drakan to spread Morytania's populace further west. Gameplay in Armies of Gielenor - Zamorak's Return suggests that Senntisten was severely weakened by a simultaneous Saradominist attack in which it finally succumbed to Zamorakian forces shortly before 3740, and its population was largely destroyed. Zamorak's hold on the city would prove brief, however, and by 3804 Senntisten had been destroyed by Saradominists. To cover up evidence of Zaros's existence, they created Saranthium, a city that covered Senntisten's eastern ruins. Saranthium, despite its vibrant beginnings, was abandoned in the early Fourth Age. The people of Avarrocka may have used its eastern ruins as a sacred place, unaware that they covered up Zaros's former capital.
Although Varrock now exists where Senntisten's centre 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 Senntisten ruins still appear to posess 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.