In their long-lasting history the Serbs had a number of dynasties:

-The Nemanics, Kotromanics, Lazarevics, Brankovics, Crnojevics, Petrovics-Njegos, Karadjordjevics and the Obrenovics-

Not even one of Serbian Dynasties was elaborated historiographically, either in its entirety or in details. It can't be said that most of our rulers didn't have written biographies but none of the historians dared to rewrite them into dynastic history.
So we can see that Serbian historiography is pretty far away from studying the details that followed different moments of a ruler's life, such as: The Court, The Court Rules, Court institutions, everyday life of the ruler's family members, the symbols of his rank, the acts of anointment and coronation, his way of ruling the country and his titles (Grand-Duke, King, Tsar, Vozd, Despot), his wardrobe and his personal things, the throne itself, successive inheriting of the throne, the Regency, the family estate, his ruling ideology, political life and such like.
The basic facts about those things can neither be found in encyclopedias nor in encyclopedia text-books. Nobody dealt with these interesting data either at the time of Kingdom or at the time of Republic.
The Obrenovics Dynasty, as the Karadjordjevics Dynasty, too gave five rulers to the Serbian people- Grand-Dukes: Milos (1815-1839, 1858-1860), Milan (1839), and Mihailo (1839-1842, 1860-1868) and Kings: Milan (1868-1889) and Aleksandar (1889-1903). So the House of the Obrenovics belongs to the group of the most meritorious families of our entire past. They were on the throne of Principality and of Kingdom of Serbia for 72 years. During two periods they were the rulers of Serbia (1815-1842 and 1858-1903), and the Karadjordjevics ruled in Serbia and Yugoslavia during three periods (1804-1813, 1842-1858 and 1903-1945). The reign of the Obrenovics was directly connected to Serbia only, the reign of the Petrovics-Njegos Dynasty was connected only to Montenegro, but the Karadjordjevics succeeded in getting the reign over Croats and Slovenians, too.
The Obrenovics nourished the Serb nationality and they were mastered by the idea of the union of all the Serbs. The only exception (but very indulgent one) was Grand-Duke Mihailo during his second reign. The ideas of all the South Slavs living in one country, later the country of Yugoslavia were directly connected to the Karadjordjevics. Those commitments showed the greatest differences in the policy of the two Dynasties.
From three modern Serbian Dynasties, the Obrenovics were the last to come into Serbian history but they were also first to get out of it. They were on the throne of Serbia three more years than the Karadjordjrvics but if we are talking only about ruling Serbia the score is quite different. Modern Serbian state lasted for 115 years; the Obrenovics ruled for 72 years and the Karadjordjevics for 42 years (the year 1814 wasn't taken in to account). The members of the Petrovics - Njegos Dynasty, as ecclesiastic and secular wardens, ruled much longer then both of the Serbian Dynasties (1683-1918).
During the first period of the Obrenovics (1815-1842) reign and at the beginning of the second period (1858-1860) direct Milos's successors were on the throne as Grand-Dukes, and then from 1868 to 1903 there were the successors of Jevrem Obrenovic on the throne of Serbia. The former only had the ranks of Grand-Dukes and the later succeeded in getting the title of Kings.
Temporary, during the Second Rising Milos Obrenovic took the title of Vozd but soon he changed it into the title of Grand-Duke. People proclaimed him as hereditary Grand-Duke in 1817 and in 1827. Porta (Turkish assembly) did the same in 1830 by Hatisherif and Berat (kinds of Sultan's decrets). By those public decrets Serbian state and the Obrenovics Dynasty were established. As a personal symbol of Grand-Duke rank, Turkish Sultan sent to Milos Obrenovic "Hat and Berat" together with "hervania" (the imperial documents of great importance). Sultan showed his grace and his confidence to Milos with the same presents in 1835 when Grand-Duke visited him in Constantinopole.
Thanks to getting the independence (1878), spreading of territories (1831-1833,1878), joining Serbia to international affairs and eternal wish of Grand-Duke Milan to be the leader of all the peoples of the Balkans, he (after one unsuccessful attempt during the Serbo-Turkish wars), with the support of Austria-Hungarian Monarchy, proclaimed Serbia Kingdom. So in 1882 he became the First Serbian King after the Battle of Kosovo (1389).