CLAUDE CHAPPÉ (1763-1805)After the French Revolution. He invented the First Optical Telegraphy system, related to Hydraulic Telegraphy. In 1780 the Chappé brothers managed to send messages 500 m; Claude Chappé presents his idea before the National Assembly on May 22, 1792. On April 1, 1793 his proposal is approved as aid for the war. Napoleon Bonaparte gave high recognition to this invention, giving him the title of Telegraph Engineer and the rank of lieutenant. He was commissioned to build towers, separated by 14 km from each other, from where signals were sent that were captured by telescopes. from Paris to Lille. The first line was completed in 1794, it was the first telegraph line in modern history. The first message transmitted on August 15, 1794 reporting that Les Quesnoy, 224 km from Paris just an hour ago, had been liberated from the Austrians. The invention tried to be adapted for night use, using lamps, however, it did not have the expected success due to weather conditions such as fog and rain.