What was the social structure in the Byzantine Empire?

[Sweet Justice]

They spoke latin for the most part even though they were primarily hellenic (Greek) several centuries after the Western empire had dissolved.
They were led by an Emporer who was an autocrat.
They were very interested in art, jewelry, Precious metals & practiced Eastern Orthodoxy Catholicism
They considered them selves as Romans.
They built some huge churches in Constaninople (Byzantium/Istanbul).
They had for a long time a strong military & actually re-conquered the Italian peninsula under General Belisarius (known as the Last Roman).
They were quite devout religiously
They unsuccessfully in the end kept the Ottoman hordes out of Europe.
the last emporer Michael & his empress, left the country after the Ottomans defeated them & took over the entire peninsula & parts of south-eastern Europe.
allegedly Michael & his wife went to Russia & supposedly became the first Czars of Russia.
Czar is a form of the word Caesar as is Kaiser.