Louis d'Orléans (4 August 1703 – 4 February 1752) was the Duke of Orléans and a "prince du sang". At his father's death, he became the First Prince of the Blood ("Premier Prince du Sang"). Known as "Louis le Pieux" and also as "Louis le Génovéfain", Louis was a pious, charitable and cultured prince, who took very little part in the politics of the time.