During the High Middle Ages the Freiherr von Oberhofen built Balm Castle on a hill above the village. In 1200, a daughter of the family, Ita, married into the von Eschenbach family and gave this family the castle and village. In the 13th century they began a new, moated castle on the shores of Lake Thun. One of the last owners of the castle, Walter IV von Eschenbach, was assassinated along with King Albert I in 1308 by Albert's nephew John. In 1306 the von Eschenbach family was forced to sell Oberhofen and the castle to the Habsburgs. The Habsburgs appointed a succession of vassals to administer the area for them, especially the Kyburgs who also owned Thun Castle. Following the Kyburg defeat in the Burgdorferkrieg of 1383-84 and the decisive Habsburg defeat at the Battle of Sempach in 1386, Bern began to expand into the Austrian lands in the Bernese Oberland. They occupied Oberhofen in 1386 and were finally able to purchase or usurp all the land and rights from every feudal land holder in 1397. In the following year they sold the castle and Oberhofen Herrschaft to Ludwig von Seftigen, a citizen of Bern.
Over the following centuries the town, castle and herrschaft passed through several Bernese patrician families. After the male line of the von Erlach family in Oberhofen died out in 1652, Bern acquired the castle and lands. They created the bailiwick of Oberhofen and converted Oberhofen Castle into the administrative center for the bailiwick. Following the 1798 French invasion, Oberhofen am Thunersee became part of the Helvetic Republic Canton of Oberland. After the collapse of the Republic and 1803 Act of Mediation it joined the newly created Thun District.
The castle passed into private hands after 1803 and had several owners in the following years. In 1849-52 the Pourtàles family renovated and expanded the castle to its present appearance. In 1940 the American William Maul Measy established the Oberhofen Castle foundation to administer and maintain the castle. In 1952 it became a part of the Historical Museum of Bern and two years later they opened a branch in the castle.
The central keep probably dates from around 1200. The rest of the castle developed in the following centuries around this ancient keep. A chapel was added to the first floor of the keep on the lake side in 1473. Perhaps at the same time a tower was built in the lake. The lake tower appears in an illustration of the castle in 1680.
After Bern took over the castle from the von Erlach family it became the seat of a Bernese bailiff and was expanded. By 1700, the Bernese renovations were mostly complete. The original tower was partly surrounded by new buildings done in the Bernese Baroque style. On the lake side the Garden Room was built and the water tower demolished. Over the next centuries, the castle remained virtually unchanged until the castle went back into private ownership. The Neuchâtel-Prussian Count de Pourtàles rebuilt the castle in a Romantic style between 1849 and 1852. The north-eastern side of the keep was rebuilt, as was the entire western facade.
A 2.5 ha park was added south of the castle. The water tower was rebuilt and crowned with a fanciful spire. In the interior of the castle, a dining hall and grand hall were built. On the upper floors the ornate library and a Turkish smoking room were added. The Turkish smoking room was based on similar rooms from wealthy houses in Cairo and built in 1853 to 1855 on plans from the Bernese architect Theodor Zerleeder. Count Albert Alexander de Pourtalè had spent several years in Istanbul as a Prussian diplomat.References:
The Walled City of Jajce is a medieval fortified nucleus of Jajce in Bosnia and Herzegovina, with citadel high above town on top of pyramidal-shaped steep hill, enclosed with approximately 1,300 metres long defensive walls,. It is one of the best preserved fortified capitals of the Bosnian Kingdom, the last stronghold before the kingdom dissolved under the pressure of military advancement at the onset of Ottoman Empire takeover.
The entire complex of the Walled city of Jajce, with the citadel, city ramparts, watchtower Medvjed-kula, and two main city gate-towers lies on the southern slope of a large rocky pyramid at the confluence of the rivers Pliva and Vrbas, enclosed by these rivers from the south-southwest, with the bed of the Pliva, and east-southeast by the river Vrbas gorge.
The fortress was built by Hrvoje Vukčić Hrvatinić, the founder of Jajce. However, the city became the seat of the Bosnian kings, hence the royal coat of arms decoration on the citadel entrance. A part of the wall was built by the Hungarian King, while the Ottomans erected the powder magazine. The walls are high and the castle was built on a hill that is egg shaped, the rivers Pliva and Vrbas also protect the castle. There is no rampart on the south and west.
Jajce was first built in the 14th century and served as the capital of the independent Kingdom of Bosnia during its time. The town has gates as fortifications, as well as a castle with walls which lead to the various gates around the town. About 10–20 kilometres from Jajce lies the Komotin Castle and town area which is older but smaller than Jajce. It is believed the town of Jajce was previously Komotin but was moved after the Black Death.
The first reference to the name of Jajce in written sources is from the year 1396, but the fortress had already existed by then. Jajce was the residence of the last Bosnian king Stjepan Tomasevic; the Ottomans besieged the town and executed him, but held it only for six months, before the Hungarian King Matthias Corvinus seized it at the siege of Jajce and established the Banovina of Jajce.
Skenderbeg Mihajlović besieged Jajce in 1501, but without success because he was defeated by Ivaniš Korvin assisted by Zrinski, Frankopan, Karlović and Cubor.
During this period, Queen Catherine restored the Saint Mary"s Church in Jajce, today the oldest church in town. Eventually, in 1527, Jajce became the last Bosnian town to fall to Ottoman rule. The town then lost its strategic importance, as the border moved further north and west.
Jajce passed with the rest of Bosnia and Herzegovina under the administration of Austria-Hungary in 1878. The Franciscan monastery of Saint Luke was completed in 1885.
The Walled city of Jajce is located at the confluence of the Pliva and Vrbas rivers. It was founded and started developing in the Middle Ages and acquired its final form during the Ottoman period. There are several churches and mosques built in different times during different rules, making Jajce a rather diverse town in this aspect. It is declared National Monument of Bosnia and Herzegovina, and, as the old Jajce city core, including the waterfall, and other individual sites outside the walled city perimeter, such as the Jajce Mithraeum, it is designated as The natural and architectural ensemble of Jajce and proposed as such for inscription into the UNESCO"s World Heritage Site list. The bid for inscription is currently placed on the UNESCO Tentative list.