<Tr> <Th> Religion </Th> </Tr> <Tr> <Th> Art </Th> </Tr> <Tr> <Td> Literature (show) <Ul> <Li> Ancient (to 4th century AD) </Li> <Li> Byzantine (4th--15th century) </Li> <Li> Modern (post 11th century) </Li> </Ul> </Td> </Tr> <Ul> <Li> Ancient (to 4th century AD) </Li> <Li> Byzantine (4th--15th century) </Li> <Li> Modern (post 11th century) </Li> </Ul>

How did the culture of each city-state become the national culture