<Tr> <Td> <Ul> <Li> Jerusalem </Li> <Li> Nicaea I </Li> <Li> Constantinople I </Li> <Li> Ephesus </Li> <Li> Chalcedon </Li> </Ul> </Td> </Tr> <Ul> <Li> Jerusalem </Li> <Li> Nicaea I </Li> <Li> Constantinople I </Li> <Li> Ephesus </Li> <Li> Chalcedon </Li> </Ul> <Tr> <Th> Early Middle Ages (553--870) </Th> </Tr> <Tr> <Td> <Ul> <Li> Constantinople II </Li> <Li> Constantinople III </Li> <Li> Nicaea II </Li> <Li> Constantinople IV </Li> </Ul> </Td> </Tr>

What was the importance of the council of trent