Each ile is fully autonomous in its organization and decision-making. Membership in an ile is determined by the orisha who chooses their children.
ANCESTORS.
Worshipping ancestors is very important in Santeria. The eggun, the spirits of the dead, are honoured before the orishas. Prayers or offerings to the eggun always start a ceremony or ritual. The eggun are not only the spirit of one's dead ancestors, but also the spirits of the dead elders who belong to the same Ile in which one has been initiated. The eggun also consist of all the spiritual entities assigned to the individual when he was born (Gonzalez-Wippler 1989: 76). The eggun have special powers to protect their followers. To keep the eggun happy, Santeria practitioners keep a place in their home dedicated to the eggun, an altar called boveda. The boveda consists of several water goblets dedicated to one or more eggun and placed on a table covered with a white cloth. The water acts as "a kind of spiritual cleansing and as a subtle "trap- for impure spirits."" (Gonzalez-Wippler 1989: 78) Flowers, cigars, alcohol, food, and other treats are placed on the boveda. Ceremonies dedicated to the eggun must be performed after sunset. Sometimes a santero will use a black doll as a dynamic representation of the eggun. The doll is the medium through which the eggun may be contacted. An open séance is conducted when the eggun asks for a spiritual mass. The séance requires an altar like a boveda. Participants cleanse themselves with the water before the ceremony start. Some light cigars so that its smoke may attract spirits - especially African spirits. Participants join hands and the santero reads prayers from a book called La Coleccion, a compilation of invocations to the eggun. The eggun then appears and they walk around the room conversing and interacting with the participants. An eggun can possess a santero during these séances.