White Serbs, an early Slavic tribe from Northern Europe, came to Northern Greece in the 6th century. By the 8th century they had created the Serbian Principality, a Serbian country, in the Balkans. The Serbs became Christian around the 10th century. For 200 years, the Nemanjić dynasty ruled. They made Serbia a kingdom, built new towns, monasteries, and forts, and made Serbia bigger. In 1371 the Nemanjic Dynasty died out. Serbia became unsafe and local leaders fought each other for control. In 1389 the Ottoman Empire invaded Serbia. They fought against Serbia, Bosnia, the Knights Hospitaller, and the forces of many other local leaders, and won. The Turks fought the Serbs for 70 years until in 1459 the Ottoman Turks conquered Serbia.