Třeboň (; ) is a spa town in Jindřichův Hradec District in the South Bohemian Region of the Czech Republic. It has about 8,100 inhabitants. The town centre with the castle complex is well preserved and is protected by law as an urban monument reservation. Administrative parts Třeboň is made up of town parts of Třeboň I and Třeboň II, and villages of Branná, Břilice, Holičky, Nová Hlína, Přeseka and Stará Hlína. Geography Třeboň is located about east of České Budějovice and southwest of Jindřichův Hradec. Třeboň lies in the Třeboň Basin. It is known for its bogs with rich deposits of peat, which led to establishment of peat spa in the town. Třeboň is known for its fish ponds, which were established in the region since Middle Ages. Rožmberk Pond is the largest pond in the country and the largest fish pond in the world with surface area of . It was built between 1584 and 1590. The urban area of Třeboň is located on the shore of Svět pond, also one of the largest Czech ponds with . It is primarily a fish pond, but also is used for sport and recreational purposes. The whole municipal territory lies in the Třeboňsko Protected Landscape Area. The river Lužnice flows through the eastern part of the territory and supplies Rožmberk pond with water. There are many small watercourses, which supplies the other ponds. History Třeboň was established around the middle of the 12th century. Around 1300, Třeboň was already fortified. In 1341, it was first referred to as a town. In 1366, Třeboň's Czech name first appeared, and the Rosenberg family became owner of the estate. During their rule, the town gained importance and wealth. In 1376, Třeboň gained royal town privileges. At the end of the 14th century, the fortifications strengthened, which helped resist attacks during the Hussite Wars. The greatest development occurred in the 16th and early 17th centuries, when Jakub Krčín was at the head of the Rosenberg family business and started to establish new ponds in the area. The region became famous as a fish pond farming area. The end of prosperity came with extinction of the Rosenberg family, troop invasions, and several large fires. Třeboň further suffered during the Thirty Years' War, when it was held by a regiment of Scots led by Colonel Sir John Seton from 1620 to early 1622. From 1660 to