Understand 'christendom' often refers to a historical era when Christianity was dominant. The laws of early christendom were heavily influenced by the church.
Pro Tip 2/3
Geopolitical Nuance
'Christendom' can imply a cultural unity based on Christian tradition and heritage. Scholars debate the influence of christendom on modern European borders.
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Cultural Identity
It encompasses a sense of shared identity beyond geographical borders. Missionaries sought to expand christendom to new continents.