The Eucharistic theology may vary among those Christian denominations that have a liturgical offertory. In the 1549 rite, those not receiving Communion were supposed to leave after the offertory. Then follows the proper "Antiphon of the Mysteries" (Unitha d' razi), answering to the offertory. It seems that the cherubikon was a prototype of the Western chant genre offertory. In some churches music at the offertory is provided by an organist. This is also the traditional Eastern Orthodox perspective on the offertory. The offertory on that was given to the King Edward VIII. The "Sacrificium" corresponds to the Gregorian Offertory. Secondly, an attempt was made to restore the Offertory. An "Offertory" of Krall's was sung in Vienna in 1825. They may be used during Mass, for the Introit, the Offertory or the Communion. The closing movement, the Offertory, is the most complex. The "Offertory" followed, in which the King and Queen offered their regalia on the Altar. He wears a small offertory box on his back. During the Offertory, the acolyte, deacon or priest places the sacred vessels on the altar.