Petar I Petrović-Njegoš (Serbian: Петар I Петровић Његош; 1748 – 31 October 1830) was the Prince-Bishop of Montenegro from 1784 to 1830 and Exarch (legate) of the Serbian Orthodox Church in Montenegro. He was the most popular spiritual and military leader from the Petrović dynasty. During his long rule, Petar strengthened the state by uniting the often quarreling tribes, consolidating his control over Montenegrin lands, introducing the first laws in Montenegro in 1798. His rule prepared Montenegro for the subsequent introduction of modern institutions of the state: taxes, schools and larger commercial enterprises. He was canonized by the Serbian Orthodox Church as Saint Peter of Cetinje (Serbian: Sveti Petar Cetinjski / Свети Петар Цетињски).