The Church builds or acquires buildings and Entrance Rites become necessary. Lots of experiments are made over the centuries. We are left with examples of these experiments even today. At Saint Mary's, the historic Latin psalm chants are sung by the choir at the entrance of the ministers of the assembly. The prayer of the day is offered.
Entrance is accomplished.
Kyrie eleison is a wonderful illustration of the complexity of the evolution of the Entrance Rite. In the 1928 Prayer Book a form of it was used every Sunday at the beginning of the Eucharist and Gloria in excelsis was used as a hymn of praise following the ministration of Holy Communion. The use of Kyrie eleison at the beginning of Mass dates from an experiment by a pope to use the Prayers of the People as a cover for the Entrance Rite. Somehow, Kyrie eleison survives at the beginning of Mass and instead of being experienced as intercessory prayer becomes a penitential rite. Gloria in excelsis is in origin a hymn for Easter Day Morning Prayer for the pope's church in Rome.