Before the conflicts of the 1990s, Kosovo was best known as the site of a famous 14th century battle in which invading Ottoman Turks defeated a Serbian army led by Tsar Lazar. During this medieval period, Kosovo also was home to many important Serb religious sites, including many architecturally significant Serbian Orthodox monasteries. | Before the conflicts of the 1990s, Kosovo was best known as the site of a famous 14th century battle in which invading Ottoman Turks defeated a Serbian army led by Tsar Lazar. During this medieval period, Kosovo also was home to many important Serb religious sites, including many architecturally significant Serbian Orthodox monasteries. |