The work extends to the year 1600 and was prepared at the request of two archbishops, Johann VII of Schoenenberg and Lothar of Mitternich, with the intent to disprove the partisan publication of Hermann (Kyriander), Syndic of Trier.
Brouwer devoted the greater part of his life to the preparation of his book and, according to the testimony of the historian Johann Nikolaus von Hontheim, he is deserving of undying honor for his contribution to the history of the Archbishopric of Trier.
Brouwer's unflinching love of truth and his true historical method were not agreeable to the councilors of the archbishop; so, although the publication of his work had been sanctioned by the authorities of his order, it could not be issued.
Brouwer's labors were continued from 1600 to 1652 by Jacob Masenius, who issued the whole work in revised form in 1670 in two folio volumes at Liège.
Among the results of his humanistic studies is the edition of the works of Bishop Venantius Fortunatus, which was issued at Mainz in 1603, together with a life of Saint Martin of Tours.