Original: The firm Justus Perthes (now called Hermann Haack) began the publication in 1763 of the Almanach de Gotha, an authoritative directory of the world's major ruling dynasties and Europe's high nobility.
Simplified: The firm of Justus Perthes (now called Hermann Haack) began publishing the Almanach de Gotha in 1763. The almanach was a very important directory of the world's major ruling dynasties and Europe's high nobility.