In Hoi An each family has an ancestor worship house. It may be a building of 3 or 5 parts with 2 extra spaces on both sides. Although the building times of ancestors worship houses are different, they were mostly repaired in the 19th century. Only the head of the family can live in to take care of the building.
Every year, on a fixed day in the 12th lunar month, all members of the
family living far or near must come back to their worship house in
memory of their ancestors. This is also a good opportunity for them to
see their relatives, and confirm responsibility with their family.