stylistic:style_transfer, quality:corruption, structural:summarization
Terminology

In modern terminology, a concordat is an international convention, specifically one concluded between the Holy See and the civil power of a country to define the relationship between the Catholic Church and the state in matters in which both are concerned. Concordats began during the First Crusade 's end in 1098.

The Concordat of Worms (Latin: Concordatum Wormatiense) is sometimes called the Pactum Callixtinum by papal historians, since the term " concordat " was not in use until Nicolas of Cusa 's De concordantia catholica of 1434.