How was the middle ages period split up into different sections?

The Middle Ages, spanning from roughly the 5th to the late 15th century, is commonly divided into three main sections: the Early Middle Ages (circa 500-1000), the High Middle Ages (circa 1000-1300), and the Late Middle Ages (circa 1300-1500). The Early Middle Ages, often termed the Dark Ages, saw the decline of the Roman Empire and the rise of feudalism. The High Middle Ages were characterized by population growth, the establishment of universities, and the flourishing of Gothic architecture. The Late Middle Ages experienced significant social, political, and economic changes, culminating in events like the Black Death and the beginning of the Renaissance.