The 2013 Aquinas Lecture at the Dominican School of Philosophy and Theology, given by Augustine Thompson, O.P., is a fascinating presentation of the baptismal theology and practice in Northern Italy in the 13th century.
Particularly interesting to me were 1) the way in which the theology in their baptismal practice differed from the scholastic theology of writers like Aquinas, being much more “communal” in its focus, and 2) the way in which the Church in Italy preserved well into the 13th century many elements of what we normally think of as Patristic initiatory practice, including the unity of baptism, confirmation and first eucharist and immersion as the norm for all baptisms. He also raises questions I had not thought of, such as the problem of getting infants to observe the eucharistic fast.
The whole lecture is interesting, but at least watch the section describing the celebration of the Easter Vigil, which begins around the 40 min. mark.