(1719-1790), who served in the Prussian army under Frederick the Great, is chiefly famous as the husband of Caroline (1721-1774), "the great landgravine," who counted Goethe, Herder and Grimm among her friends and was described by Frederick the Great as femina sexu, ingenio vir.
Annorum, ingenio mathematico aliisque dotibus satis instructo," Coin.
Ovid expresses the grounds of that esteem when he characterizes him as "Ingenio maximus, arte rudis."
His principal works are El Heroe (1630), which describes in apophthegmatic phrases the qualities of the ideal man; the Arte de ingenio, tratado de la Agudeza (1642), republished six years afterwards under the title of Agudeza, y arte de ingenio (1648), a system of rhetoric in which the principles of conceptismo as opposed to culteranismo are inculcated; El Discreto (1645), a delineation of the typical courtier; El Oraculo manual y arte de prudencia (1647), a system of rules for the conduct of life; and El Criticon (1651-1653-1657), an ingenious philosophical allegory of human existence.
To the right of the entrance to the palace gardens is the tomb of the "great landgravine," Caroline Henrietta, wife of the landgrave Louis IX., surmounted by a marble urn, the gift of Frederick the Great of Prussia, bearing the inscription femina sexu, ingenio vir.