Rudolf moved the Habsburg capital from Vienna to Prague in 1583. Rudolf loved collecting paintings and was often reported to sit and stare in rapture at a new work for hours on end. later became the imperial crown of the
Austrian Empire.Rudolf's love of collecting for the
kunstkammer extended to decorative objects of all kinds, natural artifacts, and mechanical moving device. In addition, his court included artists who contributed ceremonial swords, musical instruments, clocks, waterworks, astrolabes, compasses, telescopes and other scientific instruments. Rudolf also attracted some of the best scientific instrument makers of the time, such as
Jost Bürgi,
Erasmus Habermel and
Hans Christoph Schissler, who had direct contact with the court astronomers and through the financial support of the court were economically independent to develop scientific instruments and manufacturing techniques. Rudolf patronized astronomers
Tycho Brahe and
Johannes Kepler, who both attended his court. Brahe, who had spent much of his life making observations of stars and planets that were more accurate than any previous observations, directed Kepler to work on the planet Mars. In doing so, Kepler found that in order to fit the observations to the required accuracy, it was necessary to assume that each planet orbits the sun in an ellipse with the sun at one focus, sweeping out equal areas in equal times, resulting in
Kepler's laws of planetary motion. It was Rudolf's patronage of the two astronomers that made this possible, as Kepler recognized when he eventually published the
Rudolphine Tables. The poet
Elizabeth Jane Weston, a writer of
Renaissance Latin poetry, published numerous odes to him while appealing for him to release her stepfather's assets. ,
Roman god of the seasons, by
Giuseppe Arcimboldo. Rudolf greatly appreciated the work. Rudolf kept a menagerie of exotic animals, botanical gardens, and Europe's most extensive "
cabinet of curiosities" A lion and a tiger were allowed to roam the castle, as is documented by the account books, which record compensation paid to survivors of attacks or to family members of victims. The
Codex Gigas was one of Rudolf's possessions. He was also alleged, by a single piece of
hearsay, to have owned the
Voynich manuscript, a codex whose author, purpose, language and script, and posited cipher remain unidentified to this day. In a letter written in 1665,
Johannes Marcus Marci claims to have heard that Rudolf acquired the manuscript for 600 gold
ducats at some unspecified time. No evidence in support of this assertion has ever been discovered. As was typical of the time, Rudolf II had a portrait painted in the studio of the renowned
Alonso Sánchez Coello. Completed in 1567, the portrait depicted Rudolf II at the age of 15. This painting can be seen at the
Lobkowicz Palace in the Rozmberk room. with clockwork, made for the Kunstkammer of Rudolf II, 1579 By 1597, Rudolf's collections occupied three rooms of the incomplete northern wing. When building was completed in 1605, the collection was moved to the dedicated kunstkammer.
Naturalia (
minerals and
gemstones) were arranged in a 37-cabinet display that had three vaulted chambers in front, each about 5.5 m wide by 3 m high and 60 m long, connected to a main chamber 33 m long. Large uncut gemstones were held in strong boxes. Apart from the fantastic nature of the objects, the aesthetics of their arrangement and presentation played an important role in highlighting the harmonious expression of divine order and the analogy of a micro-macrocosm in art, nature, and the world. Rudolf's
kunstkammer was not a typical "cabinet of curiosities", a haphazard collection of unrelated specimens. Rather, the Rudolfine
kunstkammer was systematically arranged in an
encyclopaedic fashion. In addition, Rudolf employed his court gemologist and physician
Anselmus Boetius de Boodt (1550–1632), to
curate the collection. Anselmus was an avid mineral collector and traveled widely on collecting trips to the
mining regions of Germany,
Bohemia and
Silesia, often accompanied by his Bohemian
naturalist friend,
Thaddaeus Hagecius. Between 1607 and 1611, Anselmus catalogued the
kunstkammer and in 1609 published
Gemmarum et Lapidum, the finest
gemological treatise and encyclopedia ever written for this time. and others survive in museums. ==Occult sciences==