Burg Thannstein, Medieval castle ruins in Thanstein, Germany.

Burg Thannstein is the ruin of a hilltop castle on a 565-metre granite outcrop above the church of Thanstein in the Upper Palatinate Forest. Its round bergfried, restored in 1887, survives along with partly built-over stretches of wall. The tower belongs to the Free State of Bavaria.

The Thansteiner family is first recorded in 1218 with Uto von Tannstein, whose original seat, Altenthanstein, lay about 2,000 metres west above Dautersdorf. The "new" castle above Thanstein was built in the early 14th century by this ministerial family as their main seat. In 1353 it passed to a branch of the Zenger family and later, through the marriage of Margarete Zenger to Knight Georg von Ebleben, to the lords of Ebleben. In 1811 the whole castle burned down except the bergfried.

Since June 2021 the OVIGO Theater has run guided experience tours titled "Von Raubrittern und Revolverhelden" (Of Robber Knights and Gunslingers) through Thanstein and up to the castle remains, mixing local history with storytelling. The round bergfried, restored in 1887, is the village's landmark and belongs to the Free State of Bavaria.

The ruins are located on Schlossberg Street and can be visited free of charge. The site is accessible at all times, though you should be prepared for walking over open ground to reach it.

The round bergfried, restored in 1887, is the village's landmark and belongs to the Free State of Bavaria. Since June 2021 the OVIGO Theater has run guided time-travel tours titled "Von Raubrittern und Revolverhelden" through Thanstein and up to the castle remains.