What is "jesa"

Jesa is a ceremony commonly practiced in Korea. Jesa functions as a memorial to the ancestors of the participants. Jesa are usually held on the anniversary of the ancestor's death. The majority of Catholics, Buddhists and nonbelievers practice ancestral rites, although Protestants do not. The Catholic ban on ancestral rituals was lifted in 1939, when the Pope Pius XII of the Catholic Church formally recognized ancestral rites as a civil practice (see Chinese Rites controversy). Many Korean American Christians, particularly Protestants, no longer practice this rite.