Philippe Delorme grew up in the working-class suburbs of Paris, where he followed the traditional education of public school.

This investigation, of which he is responsible for the historical part, concludes that the relic is authentic,[9][10] without really convincing some people of the end a those two-century-old dispute.

All of his objections are published in the book La Mauvaise Tête de Henri IV, prefaced by Professor Joël Cornette [fr], of the Paris 8 University.

[12][13] He cosigned also a genetic study on the Y DNA of the Bourbons, confirming the inauthenticity of the head presented as that of Henri IV.

[14] The same year, with Nicolas Doyen and Julien Morvan, he created the association "For the return to Saint-Denis of Charles X and the last of the Bourbons", buried in Slovenia since the 19th century.