Archaeologists working on the Palatine Hill here this summer excavated parts of sixth-century B.C. foundations connected to a sanctuary of a cult that ancient sources trace back to Romulus, Rome’s mythic founder — a rare find from such an early period. The discovery, archaeologists say, will probably lead to further exploration for even more ancient elements of the sanctuary, called the Curiae Veteres. The remains came to light during a continuing dig of the northeast slope of the hill. The most recent phase of the dig ended last month... The Curiae Veteres was among the most important buildings of that...