The Roman Catholic Council of Trent (1545-1563) reaffirmed the traditional medieval interpretation of the Bible. Under the direction of the Holy Spirit, there was an unwritten tradition along with Scripture. The Bible lectionary readings and the sermon remained a central part of every Sunday worship service in the so-called Mass of the Catechumenate. The second part of Mass was the Eucharistic service or the Mass of the Faithful. The Second Vatican Council (1962-1965), in this past century reaffirmed the centrality of the Bible and renamed the first part of the Sunday worship service as the Liturgy of the Word.