A Bishop performs all liturgical services in a cassock, over which special, hierarchical garments are placed. For such services the Bishop wears all the vestment of a Priest except the Phelonion (see Priests Vestments). In place of the Phelonion a Bishop wears an upper garment (Sakkos) which closely resembles the wide-sleeved robe of the Deacon. This Sakkos is symbolical of Christ's coat without a seam, woven from top to bottom. The Bishop's Stole (Omophorion) is very broad, and hangs down in front and behind over his other vestments. His Stole typifies the wandering sheep, and the hierarch, when arrayed in this vestment, bears the image of the Savior Christ, who, as the Good Sheperd, took upon his shoulders the wandering sheep and bare it in his Father's house. Some exceptions could be made for prayer services, litiyas and other private Episcopal services, when the Bishop wears a riassa or a riassa with mantiya, over which he wears a stole (Epitrakhilion) also.