The Citadelle of Quebec is an active military installation and official residence of both the Canadian monarch and the Governor General of Canada. It is located atop Cap Diamant, adjoining the Plains of Abraham in Quebec City. The citadel is the oldest military building in Canada, and forms part of the fortifications of Quebec City, which is one of only two cities in North America still surrounded by fortifications, the other being Campeche, Mexico.
The first fortifications in Quebec were built by the Governor General of New France Louis de Buade, and completed just in time for the Battle of Quebec in 1690.
After the British conquest in the second half of the 18th century, the problem of Quebec City's defences grew more acute. Fears of a potential French attempt to recapture the colony, concerns about a possible uprising by the local French population and war with the Americans forced the British to develop a new defensive strategy for the city. Between 1778 and 1783, during the American War of Independence, wooden redoubts and earthworks were constructed on Cap Diamant. The Citadel was not necessarily meant to be the central element in Quebec City's defences, but was designed to play more of a supporting role while at the same time serving as the corner stone of the system.
Having narrowly repelled the American invasion of Canada during the War of 1812, the British decided to re-examine their defensive strategy. The current fortress was constructed from 1820 to 1832.
Soldiers of the British garrison did the lion's share of the construction work. The Citadel, which was also designed to serve as a barracks and arms depot, could house between 1,000 and 1,500 soldiers and their equipment. It was rare, however, for the full complement of troops to be stationed there. In mid-19th century Quebec City, the British garrison was split between the Citadel, the Jesuit Barracks (where City Hall stands today), and Artillery Park.
The Citadel's role has evolved over time and although it was never tested in battle, it has been continuously occupied by the military throughout its history. In the years following its completion, changes were made to the defensive system in Quebec City and the surrounding area. For example, the guns on the bastions were replaced by more modern artillery. Tensions during the American Civil War (1861-1865) spurred British authorities to strengthen the city's defences further. Between 1865 and 1871, three forts (including Fort No.1 in Lauzon) were built on the Lévis heights on the south shore to provide support for the Citadel.
Today the Citadelle remains an active garrison and since 1920 is home to the Royal 22e Régiment, the Canadian Forces' sole French-language regular force infantry regiment. The Citadelle is a National Historic Site of Canada. The site receives some 200,000 visitors annually.
From its origin as a small stronghold built by the ancient Illyrian tribe Dalmatae, becoming a royal castle that was the seat of many Croatian kings, to its final development as a large fortress during the Ottoman wars in Europe, Klis Fortress has guarded the frontier, being lost and re-conquered several times. Due to its location on a pass that separates the mountains Mosor and Kozjak, the fortress served as a major source of defense in Dalmatia, especially against the Ottoman advance, and has been a key crossroad between the Mediterranean belt and the Balkan rear.
Since Duke Mislav of the Duchy of Croatia made Klis Fortress the seat of his throne in the middle of the 9th century, the fortress served as the seat of many Croatia"s rulers. The reign of his successor, Duke Trpimir I, the founder of the Croatian royal House of Trpimirović, is significant for spreading Christianity in the Duchy of Croatia. He largely expanded the Klis Fortress, and in Rižinice, in the valley under the fortress, he built a church and the first Benedictine monastery in Croatia. During the reign of the first Croatian king, Tomislav, Klis and Biograd na Moru were his chief residences.
In March 1242 at Klis Fortress, Tatars who were a constituent segment of the Mongol army under the leadership of Kadan suffered a major defeat while in pursuit of the Hungarian army led by King Béla IV. After their defeat by Croatian forces, the Mongols retreated, and Béla IV rewarded many Croatian towns and nobles with 'substantial riches'. During the Late Middle Ages, the fortress was governed by Croatian nobility, amongst whom Paul I Šubić of Bribir was the most significant. During his reign, the House of Šubić controlled most of modern-day Croatia and Bosnia. Excluding the brief possession by the forces of Bosnian King, Tvrtko I, the fortress remained in Hungaro-Croatian hands for the next several hundred years, until the 16th century.
Klis Fortress is probably best known for its defense against the Ottoman invasion of Europe in the early 16th century. Croatian captain Petar Kružić led the defense of the fortress against a Turkish invasion and siege that lasted for more than two and a half decades. During this defense, as Kružić and his soldiers fought without allies against the Turks, the military faction of Uskoks was formed, which later became famous as an elite Croatian militant sect. Ultimately, the defenders were defeated and the fortress was occupied by the Ottomans in 1537. After more than a century under Ottoman rule, in 1669, Klis Fortress was besieged and seized by the Republic of Venice, thus moving the border between Christian and Muslim Europe further east and helping to contribute to the decline of the Ottoman Empire. The Venetians restored and enlarged the fortress, but it was taken by the Austrians after Napoleon extinguished the republic itself in 1797. Today, Klis Fortress contains a museum where visitors to this historic military structure can see an array of arms, armor, and traditional uniforms.