"Nikola I Petrović-Njegoš (Serbian Cyrillic: Никола I Петровић-Његош; 7 October [O.S. 25 September] 1841 – 1 March 1921) was the ruler of Montenegro from 1860 to 1918, reigning ...
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as prince from 1860 to 1910 and as the country's first and only king from 1910 to 1918." - (en.wikipedia.org 29.12.2020)
