Before the God Wars, a Zarosian city stood where Saranthium was later built, it was the capital of the Zarosian empire called Senntisten. According to Azzanadra, it was a colossal and wonderful city, being the largest ever known, extending from Kharyll in the northeast of Morytania to Lassar, in the west, and from Padewwa to the Kharidian desert, in the south. Being the most important and largest city of Gielinor and for that reason, the other gods envied it very much. Even after Zaros fell the city survived the God Wars for 100 generations, until it finally fell to the combined forces of Zamorak and Saradomin. Sometime after this Zamorak established himself as ruler, and ruled the city by 3740 of the Third Age. Later the Saradominist forces attacked the city, and by 3804 Senntisten was gone with Saranthium built above its eastern ruins.
Saranthium was an explendid city of the Third Age, marked by a very strong influence of Saradomin, having his symbols scattered almost everywhere, pots, jugs, urns, jewellery and even on the coins. Its beginnings were vibrant and successful, but despite its lively beginnings it was destroyed by unknown causes in the early fourth age. It was a very religious city, similar to Falador, it was erected during the God Wars and was unfinished when it was destroyed, it still had some Zarosian markings under the soil and visible remnants of the Temple of Senntisten, and in the Fifth Age, excavations began on the area and many of the Zarosian markings were discovered, along with more information about Saranthium.
- Players can aid the Varrock Museum by digging on the Dig Site, uncovering items related to Saranthium and gain experience lamps, the ability of using the Digsite Pendant, numerous items and Kudos.
- ^ Dagroda, "Book of Zaros", RuneScape. "For a hundred generations we have held the Holy City against the armies of the usurper and the other gods. Alone among the armies of this world at war, we fight without the presence of our god, and yet we stand unconquered. But our city now faces an unprecedented threat. The massed armies of Zamorak and Saradomin approach us at once, each larger than any army the city has repulsed before. Wahisietel's attempts to set the armies against one another have failed. With a heavy heart, I therefore decree that we are to abandon the Holy City and retreat to the strongholds of Carrallangar, Dareeyak and Ghorrock."
- ^ Archaeological expert, "The Dig Site", RuneScape. "...Its inhabitants were human supporters of the god Saradomin. It's not recorded what happened to the community here."