Sumer
Sumer () is the earliest known civilization in the historical region of southern Mesopotamia, modern-day southern Iraq, during the Chalcolithic and Early Bronze ages, and one of the first civilizations in the world along with Ancient Egypt and the Indus Valley. Living along the valleys of the Tigris and Euphrates, Sumerian farmers were able to grow an abundance of grain and other crops, the surplus of which enabled them to settle in one place. Prehistoric proto-writing dates back before 3000 BC. The earliest texts, from c. 3300 BC, come from the cities of Uruk and Jemdet Nasr; early cuneiform script emerged around 3000 BC.
Borino
The Rhodopes are considered one of the cradles of European civilization. It is estimated that primitive people settled the region around 65,000 to 60,000 BC. The oldest evidence of human presence in the Rhodopes, flint instruments, was discovered in Borino by an archeological excavation near the current Orpheus Chalet. During fall and winter, eneolithic people lived in the caves of the region. Experts have discovered hearths from this time period dating from 4000 to 3000 BC in Yagodina Cave and idyllic figures connected with the cult to the Woman-Mother and the Sun Cult in Haramiska Cave near the Devil's Throat Cave.