Today I have been thinking about the Vatican II Constitution, Sacrosanctum Concilium.
I have found a couple of great resources that I would recommend. The first is the essay by Pamela E. J. Jackson, “Theology of the Liturgy” in Ed. Matthew L. Lamb and Matthew Levering, Vatican II: Renewal Within the Tradition (New York: Oxford University Press, 2008), p. 101-128. This anthology opens with a address by Pope Benedict XVI on “The Proper Hermeneutic for the Second Vatican Council.” ('hermeneutic' means interpretation). I highly recommend all the essays in this anthology.
Pamela Jackson also has a longer book length essay in An Abundance of Graces: Reflections on Sacrosanctum Concilium (Chicago: Hillenbrand Books LTP), 2004. This is a very informative volume which contains a lengthy appendix reprinting Sacrosanctum Concilium; Pope Pius X, Motu Proprio Tra le sollecitudini The Restoration of Sacred Music; and the extremely important work, of Pius XII, Mediator Dei (On Sacred Liturgy) 1947.
Pamela Jackson notes; “ . . . it is important to recall that [Sacrosanctum Concilium] did not suddenly appear out of nowhere, but was the culmination of over a hundred years of research, reflection, writing, and pastoral work of the Liturgical Movement” (AOG, p. 3). It is fascinating to follow this journey and to ask how we got from Pope St. Pius X to the place we are now.