The Concord of Luxembourg was an agreement signed in 1427 between the Catholic Church and the leaders of the Hussite movement which healed the schism which had split the two. Archbishop Dietrich II of Cologne headed the Catholic delegation and acted as papal negotiator for Pope John XXIII, whilst Karl von Havel led the Hussite faction's negotiations.
The key Hussite demands which the faction brought to the table were contained in the four Articles of Berlin:
- Freedom to Preach the Word of God
- Celebration of Communion of Both Kinds
- Universal poverty of Clergy
- Punishment of sinners, particularly prostitution
The final concessions presented by Archbishop Dietrich II and agreed to by Pope John XXIII were presented to the Hussites in 1427 and were as follows:
- All Catholic priests will be permitted to preach the Word of God. Although preaching in other languages will be permitted, Latin will remain the ultimate standard for Church documents, doctrine and Sermons.
- The Catholic Church will allow celebration of communion for both the chalice and the bread to all regions which request it; any people who choose to remain deviant will not be permitted to have communion in this way, given how reasonable the Church has been.
- The Church will work towards universal poverty of individual clergy members – currently, it notes that clergy members primarily have to support themselves and are not supported through the institution like monks and nuns. Clergy members will be allowed to fully handle financial affairs of their respective religious establishment and may obtain these funds through legitimate means. These funds, however, must only be used to further uphold the Word of God, and not be used for personal reasons except to cater for very basic needs. The Adelphinian Reforms will be implemented more widely, including introducing a court of discipline for deviant priests disregarding their vows or otherwise selling indulgences for monetary benefit. Individual clergy members, when following the Adelphinian Reforms, will begin to lead a more meagre life devoted to the people.
- Harsher punishment for prostitutes and other similar sinners will be dealt with under secular/civil laws. While deviants may be tried by temporal authorities, these authorities should refrain from using codes that disagree with Church law.
In return the Church required three guarantees:
- Karl von Havel instruct all Hussites to return to this reformed Catholic Church
- All fighting cease immediately
- Hussites agree to cooperate on the eventual return of the ideal meagre life for all devout Catholics.
For this purpose, Dietrich II proposed that three Hussite leaders meet with himself and the Abbess of Essen every ten years to address any further concerns that arise and ensure that these changes are made.
- Archbishop-Elector of Cologne, Dietrich II von Moers, also on behalf of His Holiness Pope John XXIII - NonsensicalJourney