Mesopotamia (modern-day Iraq), Egypt, Vietnam, India, and San Marino are believed to be some of the oldest countries in the world.
Human civilization spans over thousands of years and several great civilizations rose and just vanished as if they never existed. History records great empires to have existed in China, Egypt, Mesopotamia (present day Iraq), Persia, India, etc. that stretched far and wide and were considered to be great in their own respect. Now, each of the above mentioned countries were more like nation states which cannot be called countries because today the term country denoted something different than what was prevalent then.
These countries were ruled by several kings over the years and encompassed most of the present day boundaries. The names of these regions are mentioned in historical documents that date back to several thousand years. Did you know that San Marino has the oldest written constitution (1600 A.D.), that is in effect even today?
