Uraniborg was an astronomical observatory built by the Danish astronomer Tycho Brahe on the island of Hven in the late 16th century. Completed in 1584, it served as a center for astronomical research and was equipped with advanced instruments for its time, allowing Brahe to make precise observations of celestial bodies. The observatory was part of a larger complex that included a palace and a laboratory. Uraniborg played a crucial role in the development of modern astronomy, providing valuable data that influenced later astronomers, including Johannes Kepler, who used Brahe's observations to formulate his laws of planetary motion.