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Many liturgical theologians understand the Church’s euchology as a primary source for theological reflection. This dissertation examines the Prayers Over the Gifts (super oblata) for Sundays in Ordinary Time in their liturgical context in the current Order of Mass as such a theological source. The study begins by examining the presentation of bread and wine and other gifts at the altar in early Eucharistic liturgies. It shows how a practical activity took on cultic and sacrificial connotations. This led to the increasing elaboration of the ritual actions and prayers associated with the presentation, with the super oblata appearing in the seventh century as the sole prayer of preparation for the Eucharistic prayer in the earliest sacramentaries of the western Church. The development of the preparation rite into the highly sacrificial Offertory in the Missale Romanum 1570 is followed. Here, the numerous offering prayers obscured the liturgical and theological import of the super oblata, which were now said silently. Next, in the revision of the Order of Mass following Vatican II the Offertory became the Presentation of the Gifts, in which the sacrificial elements were lessened and the super oblata recovered an approximation o