MEJIA, Fernando de.- ¶ Libro intitulado nobiliario perfeta | mente recopylado y ordenado por el on | rrado cauallero Feranto Mexia veyn- | te quatro de Jahen &c.- Seuilla: Pedro Brun [& ] Juã Gentil, [1492].- [96] f.: il.; 28 cm.- E. Original incunabular edition of the first treaty on nobility and heraldry printed in the Iberian Peninsula, simultaneously the first illustrated book printed in Spain and the first book to include the names of printers Pedro Brun and Juan Gentil. The work, written between 1477 and 1485 by Fernando de Mexia (1424-ca. 1500), is part of the treatise tradition inspired by the works of Bartolo de Sassoferrato and Honoré Bonet, both from the 14th century, translated into Castile by Diego de Valera, in the following century. The “Nobiliário vero”, as it is better known, is divided into three parts and a prologue with the dedication to Fernando II of Aragon, the Catholic. The first part is a universal history from Adam and Eve, for the purpose of explaining the origins of the nobility; a dissertation on the foundations of the work of Bartolo de Sassoferrato follows; the third part is a treatise on heraldry, containing definitions of arms, insignia, coats of arms, flags, metals, and colours, which are distinctives of the nobility. At the end, it includes the following colophon: Acabouse la presente obra sabado xxx. de junio. año dela incarnacion: de mil y. ccc. xcij. años. En la muy noble y lleal çibdad d[e] seuilla impressa por llos onrrados varones maestros. Pedro brun. Juã gentil. fiel y verdaderamente corregida &c. Fully printed edition in two columns (three on the table) in Gothic characters, with sheets 5 and 7 composed on the front in black and red. The 93v sheets. to 95 v. include 64 small heraldic-themed xilographies depicting weapons, weapon quotas, insignia, banners, etc. Treated copy (washed and re-glued), slightly cropped, with the prejudice of occasional marginal notes from the period, which appear a little faded; it preserves, however, good margins. Fresh, fully binding of stiff parchment. Palau, 167245. Goff, M531. Haebler (Bibliography), 411. Maria Valentina Mendes (Os incunábulos das bibliotecas portuguesas), 1226. The only existing copy in Portugal (BNP, Inc. 173) is incomplete, with two leaves missing (g1 and g8).