Los condes de Barcelona vindicados by Pròsper de Bofarull i Mascaró

Written in Spanish (not in Catalan), this text was pioneer in the recovery of a vernacular memory (the one not used in literature or with cultural aims) and set up the base for the subsequent historiography.

Image from: http://ferrandantequera.blogspot.com.es/2014/12/las-mentiras-del-nacionalismo-catalan.html

Graphic Relics