<Tr> <Th> Decades: </Th> <Td> <Ul> <Li> 590s BC </Li> <Li> 580s BC </Li> <Li> 570s BC </Li> <Li> 560s BC </Li> <Li> 550s BC </Li> </Ul> <Ul> <Li> 540s BC </Li> <Li> 530s BC </Li> <Li> 520s BC </Li> <Li> 510s BC </Li> <Li> 500s BC </Li> </Ul> </Td> </Tr> <Ul> <Li> 590s BC </Li> <Li> 580s BC </Li> <Li> 570s BC </Li> <Li> 560s BC </Li> <Li> 550s BC </Li> </Ul> <Ul> <Li> 540s BC </Li> <Li> 530s BC </Li> <Li> 520s BC </Li> <Li> 510s BC </Li> <Li> 500s BC </Li> </Ul> <Tr> <Th> Categories: </Th> <Td> Births--Deaths Establishments--Disestablishments </Td> </Tr>

How long ago was the 6th century bc