<Tr> <Td> Modern (show) <Ul> <Li> Monarchy (1861--1945) </Li> <Li> Italy in World War I (1914--1918) </Li> <Li> Fascism and Colonial Empire (1918--1945) </Li> <Li> Italy in World War II (1940--1945) </Li> <Li> Republic (1945--present) </Li> <Li> Years of Lead (1970s--1980s) </Li> </Ul> </Td> </Tr> <Ul> <Li> Monarchy (1861--1945) </Li> <Li> Italy in World War I (1914--1918) </Li> <Li> Fascism and Colonial Empire (1918--1945) </Li> <Li> Italy in World War II (1940--1945) </Li> <Li> Republic (1945--present) </Li> <Li> Years of Lead (1970s--1980s) </Li> </Ul> <Li> Monarchy (1861--1945) </Li> <Li> Italy in World War I (1914--1918) </Li>

Who ruled the city states in 15th century italy