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In page Adela of Champagne:

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The marriage between Adela and Louis VII served as a peace treaty between King Louis and one of his most rebellious vassals, Theobald II of Champagne, a powerful feudal lord.[1] At the time of the marriage, the king was still mourning the death of his Spanish wife. This grief was very public on the part of the king, but Adela was praised greatly for conquering his heart "bit by bit".[citation needed] It took five years for Adela to give birth to Louis VII's only son, the future Philip Augustus, also called Philip "Dieu-Donne" or "God-given" because his birth was long-awaited by a kingdom that had enjoyed a long unbroken lineage of undisputed male heirs to the throne. Philip's birth meant the continuing rule of Capetian monarchs in France.[1]