Astro-Bulgarian philosophy, also known as Bulgarian Astronism, refers to the presence of Astronism in the Republic of Bulgaria under management and philosophical jurisdiction of The Institution of the Philosophy of Millettism for the Republic of Bulgaria, a national subsidiary for the worldwide Astronist Institution. 

The Institution of the Philosophy of Millettism for the Republic of Bulgaria oversees the construction and maintenance of observatories and planetariums throughout its jurisdiction. Bulgaria is split into twenty-seven provinces, and a metropolitan capital province, and is set to hold one Grand Observatory in the capital city of Sofia. 

History of Astronism in Bulgaria

Astronism is not currently recognised as a valid religious group by the Bulgarian government although freedom of religion for Astronists in the country has been recognised as apathetic. This means that Astronists are generally considered to be free to profess their faith publicly without societal ostracism or fear of repression. 

As of November 2019, no Astronist content had been accurately translated into the Bulgarian language meaning that Bulgarian Astronists struggle to access the full range of Astronist content that is available primarily in English. The current number of Astronists in Bulgaria is unknown, however, estimates have been placed at around 1,000.