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Primary sourceArtifact1576-1580

Uraniborg

1576-1580

The palace-observatory Tycho Brahe built on the island of Hven, funded by King Frederick II, where he and his assistants carried out astronomy, alchemy and meteorology.

Tycho Brahe commissioned and ran this observatory, making it the centre of his life's astronomical work.

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Engraved plan of Uraniborg, Tycho Brahe's observatory on Hven. Title text across the top reads Arcis Uraniburgi. A central circular courtyard holds a blue-roofed main building, surrounded by diamond-shaped gardens and tree-filled grounds, enclosed by a fortified wall with corner towers.
Engraved plan of Uraniborg, from Tycho Brahe's Astronomiae instauratae mechanica, 1598.

About this source

What it is

Uraniborg was an observatory and alchemy laboratory built on the island of Ven (Hven) from 1576, funded by the Danish king Frederick II. It was designed with the help of architect Hans van Emden and sculptor Johan Gregor van der Schardt, and was the first custom-built observatory in modern Europe. It no longer stands; it was destroyed after Brahe's death, though its grounds have since been partly restored.

Why it matters

Uraniborg shows how much resources and royal backing Tycho Brahe commanded. It housed precision instruments he invented himself, a library, a laboratory, a printing press, and even a prison, and it supported a working research community of assistants and visiting astronomers. Its abandonment after Brahe fell out of favour with King Christian IV shows how dependent even great scientists were on political patronage.

Look closer

  • What does the scale and design of the building tell you about Brahe's status and ambitions?
  • Why might a ruler want to fund a building like this?
  • What does the building's later destruction suggest about the fragility of royal favour?

This artifact is part of the curated material that grounds the AI version of Tycho Brahe on Humy.ai — when students ask about related events, the AI can quote it and cite it.

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Book

Primary source

De Nova Stella

Tycho Brahe · 1573

Hand-coloured engraving titled 'Quadrans Muralis sive Tichonicus'. Tycho Brahe sits on a wall quadrant in a multi-storey observatory with arched galleries, assistants at instruments and a table, a dog, and a globe.Painting

Primary source

Quadrans Muralis sive Tichonicus

Tycho Brahe · 1598

Scanned page of handwritten manuscript with a geometric diagram at top: circles, lines radiating from a central point labeled a, and a compass-like construction with labels including c. Below are several lines of cursive handwritten Latin-style text, some struck through.Diary entry

Primary source

Brahe notebook page

Tycho Brahe

Two-page scan of an early 17th-century book: on the left, an engraved frontispiece of a domed rotunda with columns, astronomical instruments and figures, and a tablet reading Tabulae Rudolphinae; on the right, a title page in Latin with large capitals announcing Tabulae Rudolphinae by Johannes Kepler, dated 1627, with a red library stamp at top right.Book

Secondary source

Rudolphine Tables

Johannes Kepler · 1627

Engraved print portrait of a bearded man with a large ruff collar, a fur-trimmed cloak, and chain necklaces with a medallion, shown bust-length within an arched frame. Coats of arms with name labels surround the arch and pillars, and a Latin inscription appears below.Painting

Primary source

Portrait of Tycho Brahe (without a hat)

Jacques de Gheyn II

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