450 years ago today, the keystone of Europe's first modern astronomical observatory—the Uraniborg designed by Tycho Brahe, was laid. It was also the last to be built without a telescope as its primary instrument. It was the first scientific complex to be funded entirely by a state for the purpose of research, and was so expensive it cost roughly 1% of the Danish national income. Brahe made many astronomical breakthroughs and calculations from within the walls of Uraniborg, and hosted a who's-who of European astronomical alumni. READ more… (1576)

The structure and grounds took 4 years to build in the Flemish Renaissance style on the Island of Ven, then owned by Denmark, but which is now controlled by Sweden. It's believed that parts of the structure were meant to function as astronomy instruments, including a mural quadrant affixed to the north-south wall, which was built, and a large curtain wall surrounding the property, which was not.
Instead of telescopes, Brahe turned Uraniborg into a center for the artistic production of astronomical instruments, to further refine his calculations. These include the Brass Azimuthal Quadrant, the Great Globe, the Triangular Sextant, and the the Great Equatorial




