In occasion on the celebrations of 150^th anniversary of Italian unity in 2011 Treccani publishes two volumes, updating and reviewing the historic-religious framework, which has not been substantially altered since Jemolo. One will accomplish research in different areas (culture, conflicts, conciliation, pastors, organizations, spiritual life, origins) and publish editions which may render intelligible the way in which the recent developments of this relationship are rooted in a long history and tradition.