Upper-body profile shot of a man dressed in a knight's armor.Miloš Obilić (Boj na Kosovu)' is a tragedy by Jovan Subotić (1817, Dobrinci – 1886, Zemun). The story is based on the allegedly historical figure of Miloš Obilić, a medieval Serbian knight in Prince Lazar's service during the invasion of the Ottoman Empire. Suppoedly, he was the legendary assassin of the Ottoman Sultan Murad I. in the 1389 Battle of Kosovo. Milorad Petrović (1865, Šabac – 1928, Skopje) was a Serbian actor who worked at the Royal Serbian National Theatre in Belgrade and played the leading role in the first Serbian silent film, "Life and Deeds of Immortal Vožd Karađorđe", in 1911