Museo Galileo
Across the river from Galileo's former home, a monumental sundial, installed in 2007, sits outside the Palazzo Castellani, one of the city's oldest palaces and now home to this museum dedicated to Renaissance scientists and inventors. The permanent collection features both objects and videos that enlighten you on innovations from the 14th to 17th centuries. Particularly intriguing is Antonio Santucci's armillary sphere, created in 1588 for Ferdinand I de' Medici, and an engraved geometric and military compass built by Galileo in 1606. A research library with more than 170,000 scientific books, from ancient to modern, is also open to the public.