Schänis Abbey was founded in the 9th century. According to the report of a monk from Reichenau Abbey the founder was believed to be Count Hunfried of Chur-Rhaetia, who was said to have promised Charlemagne to make the foundation for the worthy safekeeping of a precious reliquary cross containing a fragments of the True Cross, as well as an onyx vessel containing some of the Blood of Christ. Such evidence as is available does indicate that the abbey was founded at about that time, possibly as a daughter foundation of St. Stephan's Abbey in Strasbourg, but the foundation at Schänis soon fell into obscurity.
After many years Ulrich I, Count of Lenzburg, restored the abbey to prosperity and a sound economic footing by numerous gifts of property. Also, by exchanges of land and rights of patronage he created a stable and unified ecclesiastical and parochial structure in the foundation's immediate vicinity. It was presumably at this time that the dedication was altered from the 'Holy Cross' to Saint Sebastian.
In 1045 Emperor Henry III granted Schänis Abbey royal immunity and free election of its abbesses. Despite several attempts at reform Schänis remained a free secular canonry with relatively relaxed rules. In the 14th century it lost its estates in Vorarlberg and the Rhine valley.
The Vögte generally came from the greater aristocracy of the region. By inheritance from the Lenzburgs the Vogtei passed first to the counts of Kyburg, then later to the Habsburgs and the Counts of Toggenburg. By the transfer of the lordship of Windegg to the cantons of Glarus and Schwyz in 1438 the abbey passed, as part of the common overlordship of Windegg, to the Old Swiss Confederacy. Although the German Kaiser confirmed the abbey's rights in 1442, the connection to the Holy Roman Empire was broken; Glarus and Schwyz considered themselves from that point onwards as successors to the royal Vögte.
Nevertheless the abbess continued to bear the title of Princess of the Holy Roman Empire. Despite further attempts to reform the abbey's monastic life, there was no compulsion to take vows and only women of the aristocracy were accepted as community members. Applicants were initially obliged to prove descent from four grandparents of the higher aristocracy, but later from 16 great-great-grandparents of the same rank. In this way Schänis became a place of care for the unmarried female offspring of the higher nobility of southern Germany.
During the Reformation the abbey was briefly suspended in 1529, but reinstated in 1531 after the re-Catholicisation of the Linthgebiet. In 1585 and again in 1610 it burnt down, with the destruction of all the ancient deeds and privileges. At the same time there were increasing conflicts with the protecting powers, Glarus and Schwyz, who felt the foundation to be an alien body and treated it accordingly.
In 1782 the community buildings and the church were refurbished in the Rococo style. After the end of the Old Swiss Confederacy in 1798 Schänis Abbey, by the operation of the Act of Mediation of 1803, lost all its feudal rights and was gradually forced to dispose of all possessions outside the canton of St. Gallen. In 1811 the Great Council of the canton dissolved the abbey. The community buildings were sold at auction and the church was taken over for the use of the parish.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.