What did Tycho Brahe build under the patronage of the king of Denmark?

Tycho Brahe built the most sophisticated observatory of his time, known as Uraniborg, under the patronage of King Frederick II of Denmark. This observatory was equipped with advanced instruments for precise astronomical observations, which were crucial for Tycho's work in developing a new model of the solar system. His meticulous data collection and observations laid the groundwork for future astronomers, including Johannes Kepler, who used Brahe's detailed records to formulate his laws of planetary motion.

The observatory represented a significant leap in technological advancement in astronomy during the late 16th century, allowing for more accurate measurements of celestial bodies than had previously been possible. This focus on observational accuracy was a key aspect of Tycho's contribution to the field, setting a high standard for subsequent astronomical research.