The traditional Maya have their own religious functionaries, often hierarchically organized, and charged with the duties of praying and sacrificing on behalf of lineages, local groups, or the entire community. In many places, they operate within the Catholic brotherhoods (or 'cofradías') and the so-called civil-religious hierarchy (or 'cargo system'), organizations which have played a crucial role in the preservation of pre-Spanish religious traditions. The two most important male deities (Martín and Maximón) of the Tz'utujil Mayas of Santiago Atitlán, for example, have their own brotherhoods and priests. Public ritual focusing on agriculture and rain is led by the 'godfathers of the wet season' ("padrinos del invierno") among the Ch'orti's – in a particularly rich and complex system – and by the village priests ("jmenob") in Yucatán. In the private realm, nearly everywhere diviners ('seers', 'daykeepers') are active, together with curers. The performance of many of the indigenous priests, but especially of the curers, shows features also associated with shamanism.