Luis Gonzaga María Antonio Carlos Ramón Miguel de Llauder y de Dalmases, de Freixas, de Bufalá y de Camín, 1st marquis of Valldeix (1837–1902) was a Spanish Catholic publisher and a Carlist politician. He is known as leader of Catalan Carlism of the late nineteenth century. He is also recognized as founder and the moving spirit behind Barcelona-based Catholic media initiatives, especially a publishing house, a daily Correo Catalán, and a weekly La Hormiga de Oro.