Today 199 years ago, the first (modern) optical telegraph line following the mechanical telegraphy system of the French inventor Claude Chappe was established between Metz and Mainz was established. No, this wasn't the first of its kind, but it was the first to connect the former already in France established telegraphy system with a (now) German city.
On April 27, 1737, English historian and Member of Parliament Edward Gibbon was born. His most famous work, The History of the Decline and Fall of the Roman Empire, was published in six volumes between 1776 and 1788 and is known for the quality and irony of its prose as well as for its scientific historic accuracy, which made it a model for later historians.
On May, 1st, 1851, Queen Victoria opened the Great Exhibition in the Crystal Palace in Hyde Park, London, which was the first in a series of World's Fair exhibitions of culture and industry.