Explore the fact-checked online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of objective articles, biographies, videos, and images from experts.

Four major elements define an encyclopedia: its subject matter, its scope, its method of organization, and its method of production: Encyclopedias can be general, containing articles on topics in every field (the English-language Encyclopædia Britannica and German Brockhaus are well-known examples). [4] .

Four major elements define an encyclopedia: its subject matter, its scope, its method of organization, and its method of production. Encyclopedias can be general, containing articles on topics in every field (the English-language Encyclopædia Britannica and German Brockhaus are well-known examples).

encyclopaedia, reference work that contains information on all branches of knowledge or that treats a particular branch of knowledge in a comprehensive manner. For more than 2,000 years encyclopaedias have existed as summaries of extant scholarship in forms comprehensible to their readers.

The free online history encyclopedia with fact-checked articles, images, videos, maps, timelines and more; operated as a non-profit organization.

Content portals – A unique way to navigate the encyclopedia. Wikipedia's sister projects Wikipedia is written by volunteer editors and hosted by the Wikimedia Foundation , a non-profit organization that also hosts a range of other volunteer projects :

Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.

Current, peer-reviewed trustworthy research, read in 30 minutes or less across 25 encyclopedias. "Citizen science and crowd science (CS) projects involve members of the public who participate in response to an open call and who can perform a broad range of research tasks.

Encyclopaedia Britannica is the oldest English-language general encyclopedia. The Encyclopaedia Britannica was first published in 1768, when it began to appear in Edinburgh, and its first digital version debuted in 1981.