Tmogvi is a ruined castle on the left bank of the Kura River, a few kilometers downstream of the cave city of Vardzia. It is first mentioned in sources from the 9th century. It was built as a defensive work controlling the ancient trade route between the Javakheti plateau and the gorge of Kura, over a gorge formed by the Kura River. It was a crucial military stronghold in the region of Javakheti. The feudal lords of the region were at that time the Bagratids, the Georgian branch.
Tmogvi gained importance after the neighboring town and fortress of Tsunda was ruined around 900 AD. By the beginning of the 11th century, the fortress had passed under the direct control of the unified Kingdom of Georgia.
In 1073, it was given in apanage to the nobleman Niania Kuabulisdze; his descendants kept it in the following centuries, before it passed to other major feudal families such as the Toreli, the Tmogveli, the Shalikashvilior the Jaqeli. In 1088, the castle collapsed in an earthquake. The medieval Georgian writer Sargis Tmogveli was from Tmogvi. The Ottoman Empire gained control of the fortress in 1578. In 1829, the Treaty of Adrianople transferred the fortress, among with the surrounding region, to the Russian Empire.
The castle expands over 3 hills, joined and encircled by a wall (150 meters long, 3 meters wide), which supplements the natural defense offered by the cliffs. A number of towers was built on each hill. A secret tunnel connects the castle with the river to provide access to water even during a siege. The western part of the fortress is better preserved. A small number of buildings subsist inside the castle itself. A quadrangular building made of tuff on a basalt foundation is assumed to have been a church. Outside of the walls, on the western side, the church of Saint Ephrem subsists in ruined condition, with fragments of frescoes from the 13th century.References:
German crusaders known as the Livonian Brothers of the Sword began construction of the Cēsis castle (Wenden) near the hill fort in 1209. When the castle was enlarged and fortified, it served as the residence for the Order's Master from 1237 till 1561, with periodic interruptions. Its ruins are some of the most majestic castle ruins in the Baltic states. Once the most important castle of the Livonian Order, it was the official residence for the masters of the order.
In 1577, during the Livonian War, the garrison destroyed the castle to prevent it from falling into the control of Ivan the Terrible, who was decisively defeated in the Battle of Wenden (1578).
In 1598 it was incorporated into the Polish-Lithuanian Commonwealth and Wenden Voivodship was created here. In 1620 Wenden was conquered by Sweden. It was rebuilt afterwards, but was destroyed again in 1703 during the Great Northern War by the Russian army and left in a ruined state. Already from the end of the 16th century, the premises of the Order's castle were adjusted to the requirements of the Cēsis Castle estate. When in 1777 the Cēsis Castle estate was obtained by Count Carl Sievers, he had his new residence house built on the site of the eastern block of the castle, joining its end wall with the fortification tower.
Since 1949, the Cēsis History Museum has been located in this New Castle of the Cēsis Castle estate. The front yard of the New Castle is enclosed by a granary and a stable-coach house, which now houses the Exhibition Hall of the Museum. Beside the granary there is the oldest brewery in Latvia, Cēsu alus darītava, which was built in 1878 during the later Count Sievers' time, but its origins date back to the period of the Livonian Order. Further on, the Cēsis Castle park is situated, which was laid out in 1812. The park has the romantic characteristic of that time, with its winding footpaths, exotic plants, and the waters of the pond reflecting the castle's ruins. Nowadays also one of the towers is open for tourists.