<limping by...>
Rough in of the Broken Arch (based on mesh by Jörg Gerlach)
Edit: A bit more back-story...
The 17 Great Weapons of Amethyst were created during the Twin Empire 12,000 years ago and most of the surviving architecture are places of arcane and divine power.
Two of them, Castles White and Black are living artifacts.
Castle White and it's ring of Broken Arches, located in the capital city of Arrowhead is the heart of the kingdom of Man on the continent of Man.
Castle Black, the legendary Castle in the Sky, was Ensouled at the same time. It's whereabouts, or even the truth of its existence, are unknown.
The Twin Empire was a period of transition between the fading Second Age of Elves and the coming Second age of Dwarves. One of the things that made this period unique was the lack of violent change and the rich cooperation between the two races. The art and knowledge of the Twin Empire is believed to have nearly rivaled the Age of Wonder (before Moonfall).
Artifacts and relics of the Twin Empire are highly sought after, extremely rare and always powerful.
It is rumored that merely touching certain Broken Arches may remove a curse. Others are known to kill on contact. Some heal and some appear to do nothing but hum with a sound so low you feel it in your gut.
It is also known that buildings constructed too close to an Arch will fall to ruin within months. Always.
<...on his way elsewhere>