Jean-François-Albert Du Pouget, Marquis de Nadaillac (1818-1904) was a French anthropologist and palaeontologist.
The scion of an old French aristocratic family, he devoted his earlier years to public affairs, and served in 1871 and 1877 respectively as Préfet of the Departments of Basses-Pyrénées and Indre-et-Loire. On completing his term of office he retired into private life and devoted himself to scientific research, chiefly in the lines of Palæontology and Anthropology, giving particular attention to American questions, upon which he was a leading authority.
Over the course of his career as a scholar and researcher, Du Pouget published many fundamental essays.
The Du Pouget's short essay Megalithic Monuments in Spain and Portugal, which we propose to our readers today, was published in May 1887 on the magazine Popular Science Monthly.