What are the characteristics of Byzantine culture and art?

After thousands of years, the culture and art of Byzantine Empire are unique. Byzantine culture is exclusive to Christianity, and its soil is the classical culture of Greece and Rome, but it also draws sufficient nutrition from the eastern culture of West Asia and North Africa. He has made many achievements in the fields of religion, literature and history, and architectural art. It is a bright pearl in the long river of human medieval culture and has special historical value. The 6th century was its first golden age, and the 9th ~11century was its second golden age. 14 and 15 centuries, the so-called "Byzantine Renaissance" echoed the Italian Renaissance.