Baron Pavel L'vovitch Schilling, also known as Paul Schilling (5 April 1786, Reval (now, Tallinn), Russian empire – St. Petersburg, Russia, 25 July 1837[1]), was a diplomat of Baltic German origin employed in the service of Russia in Germany, and who built a pioneering electrical telegraph. It consisted of a single needle system which used a telegraph code to indicate the characters in a message.