One of the most important extant ceremonials was written in 1662 and regulated the diocese of Paris. According to this ceremonial, the organ begins the Kyrie and alternates with the choir through ninefold repetitions (and so ends the Kyrie as well). After the priest intones the first line of the Gloria, the organ again begins the alternation with the choir. After the final verse of the Gloria (which began at "in gloria Dei Patris") the organist would accompany the Offertory: this time there is no alternation and the music does not replace the chant as earlier (while there are texts for the Offertory, they are not for the choir). After the Offertory comes the Sanctus, followed by the Elevation, a high point in the liturgy. The Sanctus begins with an organ verse and proceeds in any of the following three ways: