November 8, 1793
In Paris, the French Revolutionary government opens the Louvre to the public as a museum.
The Louvre Museum
The Louvre (Le musee du Louvre) – is one of the world's largest museums, the most visited art museum in the world and a historic monument. A central landmark of Paris, it is located on the Right Bank of the Seine in the 1st arrondissement (district). Nearly 35,000 objects from prehistory to the 19th century are exhibited over an area of 60,600 square metres (652,300 square feet).
March 2, 1791Long-distance communication speeds up with the unveiling of a semaphore machine in Paris.
A semaphore telegraph, optical telegraph, shutter telegraph chain, Chappe telegraph, or Napoleonic semaphore is a system of conveying information by means of visual signals, using towers with pivoting shutters, also known as blades or paddles. Information is encoded by the position of the mechanical elements; it is read when the shutter is in a fixed position. These systems were popular in the late 18th to early 19th century. In modern usage, "semaphore line" and "optical telegraph" may refer to a relay system using flag semaphore, and "optical telegraph" may refer to a heliograph (optical telegraphy using mirror-directed sunlight reflections).