Any history of Christian liturgy must address the origins and development of the various material elements that are used during these celebrations. These have their own specific history, just as does the architectural and artistic context of the liturgy. Many of the specialized garments, or vestments, worn by ministers during liturgical services in several contemporary Christian churches originated in elements of ordinary or honorific dress used in the ancient Roman Empire. Over the course of several centuries, the style and type of vestments used in Western Christianity diverged from those used in Eastern Christianity, until today the differences are more striking than the similarities, even in shared individual elements like the stole and the chasuble. In addition, different kinds of vestments are used by different ministers (for example, the deacon, priest, or bishop) and in different kinds of sacramental and liturgical ceremonies. What a minister might wear at one service, for example evening prayer or the administration of baptism, might not be the same as those expected for the celebration of the Eucharist (the Mass, the holy communion, or the divine liturgy). The same is true for the essential vessels used during the celebration of the Eucharist: the chalice to hold the wine, and the paten, or plate, on which rests the bread to be blessed. Both of these have developed in distinctive styles in both West and East over time. The same is true of many of the other vessels and implements needed for the Eucharist and those used in other liturgical services. Examples include containers designed to hold water, oil, or incense as well as the number and style of altar cloths, veils, and candles utilized at different times and places.