The Sihedron Rune

Sheriff Hemlock doesn't recognize the strange seven-pointed star carved into the dead man's chest, but the heroes do: It's the same star from the dungeons below Thistletop and on the magic amulet worn by Nualia. Good thing Sandpoint has its very own Thassilonian expert!
This person is Brodert Quink, an authority on Varisian history who moved to Sandpoint to study the Old Light. Brodert is tremendously excited to be involved in a murder investigation, and does everything he can to aid the heroes. Unfortunately, much of the lore about ancient Thassilon has been lost; what does remain has been gathered from barely legible carvings on the surviving monuments or extracted from the myths and oral traditions of Varisian seers and storytellers.
What he knows about Thassilon is that it was a vast empire ruled by powerful wizards. The sheer size of the monuments they left behind testifies to their power, and the unnatural way many of these monuments have resisted erosion and the march of time testifies to their skill at magic. Most sages place the height of the Thassilonian empire at 7,000 to 8,000 years ago, but Brodert thinks the empire was even older - he suspects (correctly) it collapsed no sooner than 10,000 years in the past.
Much of what Brodert has to say is vague theory based on conjecture - his belief that the Old Light was once a war machine capable of spewing fire from its peak is relatively unpopular among his peers, for example. Yet he can tell Fay a few things of interest about the star - namely, that it seems to be one of the most important runes of Thassilon. The star itself is known as the "Sihedron Rune," and signifies not only the seven virtues of rule (generally agreed among scholars to have been wealth, fertility, honest pride, abundance, eager striving, righteous anger, and rest), but also the seven schools of magic recognized by Thassilon (divination magic, Brodert points out, was not held in high regard by the ancients).
Brodert notes with a smirk that much of what is understood about Thassilon indicates its leaders were far from virtuous, and he believes the classic mortal sins (greed, lust, pride, gluttony, envy, wrath, and sloth) rose from corruptions of the Thassilonian virtues of rule. In any event, the Sihedron Rune was certainly a symbol of power, one that may well have stood for and symbolizedthe empire itself.