The T'Karath Sanctuary in 2154.
The T'Karath Sanctuary is a historic site located in Vulcan's Forge on planet Vulcan. It was an underground hideout for the Syrrannites in the early 2150s, which is why much of the Sanctuary was destroyed in aerial bombardments by the Vulcan High Command in 2154. (ENT:"The Forge", "Awakening", "Kir'Shara")
By 2370, the cavern had been abandoned for centuries. There are remnants of decaying Vulcan artifacts lying around, and some cracked and peeling glyphs on the walls. A crude stone altar still sits prominantly in the room. The Vulcan isolationist movement stored a piece of the Stone of Gol here which they had stolen and this is where the whole weapon was finally reassembled by Tallera, one of the isolationist operatives. She was captured and the Stone retreived by Starfleet Captain Jean-Luc Picard. (TNG:"Gambit, Part II")