The Bonn Agreement of 1931 is a document, negotiated on 2 July 1931 in Bonn, which established full communion between the Church of England and the Old Catholic churches of the Union of Utrecht, including the Old Catholic Church of the Netherlands. This full communion has since been extended to all churches of the Anglican Communion through their synods.
The agreement expresses three principles:
To monitor the progressive growing together of the two communions, the Anglican-Old Catholic International Co-ordinating Council was established by the International Bishops' Conference and the Lambeth Conference. Its first official meeting took place in 1999.