Numerous Serbian mediaeval monasteries, including Studenica, Our Lady of Levi, Deani, Graanica, Sopoani, the Patriarchy in Pe, and the Old Fortress of Ras, are included as UNESCO World Heritage Sites. The oldest surviving manuscript in the world, Miroslav's Gospel, was also created in Serbia. It has been designated a World Documentary Heritage by UNESCO. One of the four Roman capitals, the ancient city of Sirmium (modern-day Sremska Mitrovica) was in Serbia. There is little wonder that history buffs are drawn to Serbia travel packages. According to several international surveys, Serbia is the world's friendliest country. Their exemplary hospitality standards can be attributed to the old Slavic concept that if a host is not friendly to a visitor, the gods would not favour the host. Because of this, selecting a Serbia holiday package won't require much thought. You can count on a warm welcome everywhere you go, whichever Serbia package you select.