It is very important that when you travel to a new destination or just if you travelled there before to know about the history of the place. The old Empire of Byzantium it is a very important both for history and for tourism as well, by knowing the history it will be much easier to understand the tourist spots of a country and you can even make some routes to track the historical events of different important Empires, important people etc.
The Byzantium Empire was the first Christian Empire and had a great contribution to the literature, arts and on political systems. Byzantium Empire had the most precious Christian relics in that time. The location of the Empire was on the border of Europe and Asia, and spread on the Balkan areas as well. The spreading of Islam influenced this Empire to shrink. One of the most important Churches of Byzantium Aya Sofia, became Istanbul's most famous Mosque.
The video below gives a better explanation of the Byzantium Empire and also provides visual evidences of the Empire that Byzantium was.