Sacristan n. : An officer of the church who has the care of the utensils or movables, and of the church in general; a sexton.

Example:
where can i find a site where there's a list of Sacristan symbols.its image,origin and history..thanks?

Taxonomy
sacristan, duties, the church, free encyclopedia, office, benefice, vestments, Custos, ceremonies, Masses, canons, assistants, lib, officio, Decretals of Gregory IX, search, free dictionary, officer.

Defination from the web:
sacristan were performed by the doorkeepers (ostiarii), later by the mansionarii and the treasurers. ... that in cathedral and collegiate churches the sacristan should be a priest, and describes his duties ... Main article: Custos (Under-sacristan) ...