Encyclopædia Britannica, founded in 1768, has been serving knowledge seekers around the world for 250 years. To commemorate this milestone we're publishing the Encyclopædia Britannica Anniversary Edition: 250 Years of Excellence (1768-2018). Designed both to complete your Britannica yearbook collection and to serve as an engaging stand-alone volume, this individually numbered, special collector’s publication is a rare compendium of knowledge, insights, and history and will be the last edition in the 80-year tradition of Britannica's distinguished yearbooks.