The exact building date of Castel Gavone ('Castrum Govonis'), the former seat of the Del Carretto Marquisses, is still unknown. The castle rises on a huge, steep curvilinear rampart on top of the Becchignolo hill.
The castle was allegedly built by Enrico II in 1181 on remains of previous defensive structures. It was certainly fortified in 1292. Destroyed during the struggles with Genoa, it was rebuilt by Giovanni I in 1451-1452, along with the Borgo walls.
It underwent further modifications until 1715 when it was largely dismantled by the Genoese who wanted to destroy the symbol of their ancient enemy after their conquest of the Marquisate. Only some of the retaining side-walls were spared in addition to the very famous Diamond Tower (today the best-preserved structure). The Tower, which has a curved triangular base, was built using diamond-faceted squared stones. It faces south with its acute edge resembling the bow of a ship. It is an excellent example of late medieval military architecture. Many of the original materials such as beams, stones and columns, were later used to build churches, gates and houses.References:
Hluboká Castle (Schloss Frauenberg) is considered one of the most beautiful castles in the Czech Republic. In the second half of the 13th century, a Gothic castle was built at the site. During its history, the castle was rebuilt several times. It was first expanded during the Renaissance period, then rebuilt into a Baroque castle at the order of Adam Franz von Schwarzenberg in the beginning of the 18th century. It reached its current appearance during the 19th century, when Johann Adolf II von Schwarzenberg ordered the reconstruction of the castle in the romantic style of England's Windsor Castle.
The Schwarzenbergs lived in Hluboká until the end of 1939, when the last owner (Adolph Schwarzenberg) emigrated overseas to escape from the Nazis. The Schwarzenbergs lost all of their Czech property through a special legislative Act, the Lex Schwarzenberg, in 1947.
The original royal castle of Přemysl Otakar II from the second half of the 13th century was rebuilt at the end of the 16th century by the Lords of Hradec. It received its present appearance under Count Jan Adam of Schwarzenberg. According to the English Windsor example, architects Franz Beer and F. Deworetzky built a Romantic Neo-Gothic chateau, surrounded by a 1.9 square kilometres English park here in the years 1841 to 1871. In 1940, the castle was seized from the last owner, Adolph Schwarzenberg by the Gestapo and confiscated by the government of Czechoslovakia after the end of World War II. The castle is open to public. There is a winter garden and riding-hall where the Southern Bohemian gallery exhibitions have been housed since 1956.