St. Walfridus kerk was founded ca. 1050. Bedum became a place of pilgrimage because of the graves of martyrs Walfridus and Radfridus. Two churches were built, originally in wood. Nothing remains of the chapel of Radfridus, and the St. Walfridus church did not survive in good state either due to a downturn in pilgrimages after the 16th century.
In ca. 1050 work started on a three-aisled cruciform basilica in Romanesque style, which was completed in the 12th century. Of this church only the tower remains. Traces of arches indicate that this tower originally was part of a reduced westwork, with spaces flanking the tower on both sides. These were demolished soon after. The tower leans forward, more than any other tower in the country. It is argued that the tower leans more than the Leaning Tower of Pisa, due to restoration at the latter site.
Of the original nave only a few pillars and a small piece of wall have survived. In ca. 1484 the church was enlarged into a two-aisled hall-church. The southern side-aisle was replaced by a new one in Gothic style which was of the same height and width as the nave. The southern transept-arm was renewed in the same style and completely integrated in the side-aisle. On the northern side either a lower side-aisle or a series of chapels was added. An incomplete transept-arm is still recognizable. In the first decades of the 16th century a new Gothic choir with an ambulatory was built, fit for the church's use by a chapter, which was demolished by the Protestants in ca. 1600. In about the same period the walls of the northern transept-arm were lowered and partly rebuilt. Later the complete northern wall was renewed.
The sagging of the tower has been a problem for a long time. In the 17th century buttresses were added, which already needed replacing in ca. 1800 and were again demolished in the 1850s. During a restoration in 1953-1958 a more perment solution was found by adding an underground counter-weight. The same restoration resulted in the lozenge roof of the tower, which replaced a flat roof that had covered the tower ever since a fire destroyed the spire in 1911.References:
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.