<Para que sus deliberaciones y consejos no vayan herrados sino acertados>. Gonzalo de la Caballería y el retablo de la capilla del Concejo de Zaragoza (1443)

This article delves into a missing work of art, the Gothic altarpiece that presided the chapel of the Casas del Puente of Zaragoza, the ancient seat of the city council. Although the work was hired in 1443 by the sculptor Pere Joan, the contract describes a mixed altarpiece of painting and sculpture, which justifies that the painter Pascual Ortoneda was engaged in the project. It was a very innovative artistic initiative, because the sculptor was asked to execute an altarpiece in a Flemish manner. The work, therefore, represented one of the first signs of the penetration of the late Gothic language in the Aragonese territory.One of the most interesting aspects of the project concerns who coasted it, Gonzalo de la Caballería, a member of the municipal corporation of high intellectual level and great economic capacity. The promoter possibly sought to obtain social returns associated with prestige and personal promotion, because he was a member of a family of Jewish converts.In any case, the most interesting is that the altarpiece transmitted a civic and moral messagethat sought the exaltation of the municipal institution as a place of justice and complianceof ethical values, which is framed in the context of dissemination of the political theoriesof Francesc Eiximenis.