The Belogradchik Fortress,also known as Kaleto, is an ancient fortress located on the north slopes of the Balkan Mountains, close to the northwestern Bulgarian town of Belogradchik and is the town's primary cultural and historical tourist attraction, drawing, together with the Belogradchik Rocks. It is one of the best-preserved strongholds in Bulgaria and a cultural monument of national importance.
The fortress's walls are over 2 metres thick in the foundation and reaching up to 12 m in height. Three separate fortified yards exist that are connected with each other through gates. The fortress has a total area of 10,210 square metres.
The initial fortress was constructed during the time when the region was part of the Roman Empire. The rock formations in the area served as a natural protection, as fortified walls were practically only built from the northwest and southeast, with the yard being surrounded by rocks up to 70 m high from the other sides.
Initially, the Belogradchik Fortress served for surveillance and not strictly defense. The Bulgarian tsar of Vidin, Ivan Stratsimir extended the old fortress in the 14th century, building fortified garrisons in front of the existing rock massifs. During Stratsimir's rule, the Belogradchik Fortress became one of the most important strongholds in the region, second only to the tsar's capital fortress of Vidin, Baba Vida.
During the Ottoman conquest of Bulgaria, the fortress was captured by the Ottomans in 1396. They were forced to further expand the stronghold due to the intensified hajduk and insurrectionist activity in the region.
Considerable changes to the fortress were made in the early 19th century. These changes were typical for the Ottoman castle architecture of the period, a full reorganization being carried out, as well as additional expansion. Typically European elements were added to the Belogradchik Fortress owing to the French and Italian engineers that participated in the expansion.
The stronghold had an important role in the Ottoman suppression of the Bulgarian Belogradchik Uprising of 1850. It was last used in warfare during the Serbo-Bulgarian War in 1885.
References:The Château du Lude is one of the many great châteaux of the Loire Valley in France. Le Lude is the most northerly château of the Loire Valley and one of the last important historic castles in France, still inhabited by the same family for the last 260 years. The château is testimony to four centuries of French architecture, as a stronghold transformed into an elegant house during the Renaissance and the 18th century. The monument is located in the valley of Le Loir. Its gardens have evolved throughout the centuries.