When Louis became King of France in 1314, upon the death of his father Philip IV, Champagne became part of the Crown's territories.
Theodore Evergates, Feudal Society in the Baillage of Troyes under the Counts of Champagne, 1152-1284 ISBN 0801816637
Theodore Evergates, Feudal Society in Medieval France: Documents from the County of Champagne, ISBN 0812214412 (paperback), ISBN 0812232259 (hardback)
Theodore Evergates, 'The Aristocracy of Champagne in the Mid-Thirteenth Century: A Quantitative Description', 'Journal of Interdisciplinary History', vol. 5. pp. 1-18 (1974)