What is the ancestor worship in Rome?

Ancestor worship has been popular in Rome for a long time, and the deceased is regarded as the patron saint of family and clan. In order to worship the gods, the Romans built a large number of temples, formulated festival ceremonies and provided supplies for the priests. Whenever there is a major event, the Romans will ask God for advice, and fortune tellers will predict good or bad by observing birds and lightning in the air or the internal organs of animals.