The Roman Empire had expanded and reveled in its conquest for many centuries until the Empire ultimately fractured into two clear and separate segments: Eastern and Western Roman Empires, with all the animus and mistrust that a distinct split tends to have on a society.
Out of the animus and infighting the leader of the Eastern Roman Empire, Constantine, emerged as the most influential and powerful and began what is now better known as the Byzantine Era, succeeding in reuniting the two empires.
During this period records show that Constantine and his court enjoyed a variety of forms of theatre including pantomime and true mime and others simply recited the favorite passages of the tragedies and the comedies of, again, the early Greeks.
Constantine is responsible in the eyes of many historians, among many other fundamental accomplishments, for the mass preservation of the early Greek classics. The ancient texts were stored along massive amounts of information of the Greek writings in an encyclopedia called the Suda from which historians have been able to learn things about the early Greek writings that may have otherwise been lost to history if not for that incredible undertaking.
The next few centuries however would not be so mindful of the need for the preservation of ancient texts but rather mired in the controversies and conflicts of the general disorder of the 5th century. This period of turmoil lasted until the 10th century, and during that time there was very little in the way of organized theatre in western Europe.
The Church, who was rising in power during the preceding centuries, also had an impact and an influence on this, by banning certain travelling theatre troupes that they deemed crude.
Only after the Church began putting on theatrical versions of the Bible stories did a resurgence begin with liturgical dramas being performed. This ultimately led to a to a burgeoning of non liturgical plays and theatre got out of it revived – once again.