Wyher Castle is a moated castle, which lies south of the village center of Ettiswil. It was first mentioned in 1304 as the home of the Freiherr von Wediswil. After passing through several owners, around the end of the 15th century it was acquired by the Feer family. Around 1510, Petermann Feer rebuilt it into a late-Gothic castle. In 1588 it was inherited by Ludwig Pfyffer von Altishofen, whose descendants adopted the name Pfyffer von Wyher. Between 1837 and 1964 it was owned by the Hüsler family, who were local farmers.
In 1964 a fire partially destroyed the castle and it was acquired by the canton. Renovations in 1981–83 and 1992–96 repaired the damage and restored the moat. In 1996 it became a museum, housing the Josef Zihlmann collection of local religious art.
References:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.