Crystilan

While its original name has long been lost, the site called Crystilan is today among the best-known Thassilonian artifacts, and has provided scholars with much of what they now know about Thassilonian life. Visible from the sea, the shining dome of translucent crystal is glorious to behold, catching the sun’s light and making it too bright to stare at directly. Up close, the adventurous can peer through the smooth, almost frictionless crystal at the chunk of city within, perfectly preserved like a fly in amber. Though many have attempted to break through and reach the great stepped temples and vast arches, no magic or weapon currently known has ever been able to mar or otherwise penetrate the crystal, and those who have attempted to tunnel under it believe the strange shield to be a perfect sphere. For now, at least, most scholars are content to transcribe the visible runes and watch the strangely deserted city as it proceeds, unchanging, through the ages toward some unknown purpose.