This document provides a summary of the history and origins of the ancient Egyptian city of Abydos and its importance in Egyptian culture. It notes that Abydos was one of the earliest centers of worship in Upper Egypt and was an important pilgrimage site associated with the god Osiris. The document describes the annual holy procession that took place there over 28 days, involving priests and pilgrims. It also mentions some of the important archaeological remains at Abydos, including temples and tombs, and its significance as a religious center from the Early Dynastic period through the New Kingdom.