Parsis: I assume you mean "Senntisten", although don't worry, many people get its name wrong...
As for your question, in times long past, Senntisten was the capital of the Great Lord's vast empire. It was a vast center of trade, learning, and cultural exchange, all under the benevolent rule of the Great Lord. And within the city stood the greatest of all the Great Lord's temples.
In fact, after that unfortunate incident where the filth, Zamorak managed to steal some of the Great Lord's power, the temple was set up so as to allow communication with the Great Lord. That all ended when Senntisten fell... that battle was truly tragic, but is a tale for another time. I will say though that not a single civilian survived the blades of the Zamorakian conquerors, not even the youngest child nor the eldest sage.
As to how the city is useful to us; Most important is the temple inside the city, which possesses a portal through which the Great Lord can communicate with us. Also, you may recall that the Great Lord's avatar is on this land? That is because some of his power slipped through the Pandaemonium Gates. So long as the portal in the temple is open, he can control that power. I shudder to think what would happen if it was closed or worse, destroyed. Secondly, the temple and what little of the city we have rebuilt inspire awe. Many people, upon seeing it are driven to learn more about the Great Lord, and many of these join the ranks of his faithful. On another note, it sends quite a message to those idiotic Saradominists and Zamorakians. They worked together to wipe Senntisten off the face of Gielinor, and to erase the memory of the Great Lord, yet now as it is rebuilt, they are forced to realize how futile their efforts were.
Finally, when the Great Lord returns, he will desire a seat of power from which he may extend his benevolent rule to all people, Senntisten is ideal for this.
Well, I believe I answered your question, may the Great Lord smile on you, Dogone.
"He appears in the Form of a Man with many Countenances; and he hath a Book in his right hand. His Office is to teach all Arts and Sciences unto any; and to declare the Secret Counsel of any one."
22-Aug-2010 04:46:37