broad church

from the GNU version of the Collaborative International Dictionary of English.

• (Eccl.) A portion of the Church of England, consisting of persons who claim to hold a position, in respect to doctrine and fellowship, intermediate between the High Church party and the Low Church, or evangelical, party. The term has been applied to other bodies of men holding liberal or comprehensive views of Christian doctrine and fellowship.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Australia, idiomatic A wide scope of philosophies and ideas.
• proper noun Alternative capitalization of Broad Church