Yves Congar, OP, who died in 1995, was a French Dominican widely recognized as one of the most important Roman Catholic theologians of the twentieth century and a major influence upon the theology of the documents of Vatican II. Congar drew from biblical, patristic, and medieval sources to revitalize the discipline of contemporary theology. He was an early advocate of ecumenism and also contributed to shaping the theological agenda of the twentieth-century liturgical movement. He was named a cardinal in 1994 by Pope John Paul II. Liturgical Press has also recently published At the Heart of Christian Worship: Liturgical Essays of Yves Congar and Congar's classic work True and False Reform in the Church.

Yves Congar, OP, was one of the most important and influential theologians of the twentieth century. Much of this influence came as a result of his role as theological advisor to the bishops who participated at the Second Vatican Council (1962-1965). After working under a cloud of ecclesiastical censure and suspicion in the decade prior to its start, Congar was, from beginning to end, an influential day-to-day participant in the councils work. He also managed to keep detailed personal notes throughout the time. At long last, the council diaries of Yves Congar are available in English! This material is a treasure trove of information and insight for anyone interested in the history of that council and its remarkable and historic teaching. It provides a window into the councils workings and the development of what would become a series of historic documents and declarations. It also offers Congars own down-to-earth and personal perspective on many of the other remarkable figures who played a role in the council.