Petar Pop-Arsov (Bulgarian: Петър Попарсов, Macedonian: Петар Поп Арсов) originally spelled in older Bulgarian orthography: Петъръ попъ Арсовъ; (August 14, 1868 in Bogomila, Ottoman Empire, (present day North Macedonia) – January 1, 1941 in Sofia, Bulgaria) was a Bulgarian educator and revolutionary from Macedonia, one of the founders of the Internal Macedonian Adrianople Revolutionary Organization (IMARO), known in its early times as Bulgarian Macedonian-Adrianople Revolutionary Committees (BMARC). Although he was Bulgarian teacher and revolutionary, and thought of his compatriots as Bulgarians, according to the post-WWII Macedonian historiography, he was an ethnic Macedonian.
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