The document summarizes the history of the Byzantine Empire from its founding by Constantine I in 330 CE until its fall to the Ottoman Turks in 1453 CE. It discusses how Constantinople became the new capital and prospered as a center of trade and culture. The empire reached its greatest extent under Justinian in the 6th century but later declined due to invasions and internal conflicts. Religious differences grew between the Eastern Orthodox and Roman Catholic churches, culminating in the Great Schism of 1054. The empire continued weakening and Constantinople was finally captured by Ottoman forces in 1453, marking the end of the Byzantine Empire.