Bulgarian Academy of Sciences is the National Academy of Bulgaria, established in 1869. The Academy, located in Sofia, is autonomous and has a Society of Academicians, Correspondent Members and Foreign Members. It publishes and circulates different scientific works, encyclopedias, dictionaries and journals, and runs its own publishing house.

The BAS has 9 main sections, more broadly united under three main branches: Natural, mathematical and engineering sciences, Biological, medical and agrarian sciences and Social sciences, humanities and art. Each consists of independent scientific institutes, laboratories and other sections.