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The information found on this website represents years of painstaking scholarly effort. We therefore expect that all use of PESSCA content, including the artworks and correspondences in it, be properly cited in all scholarly publications, be they printed or online. Crediting PESSCA is not just a matter of intellectual honesty (and its legal ramifications). It is also a means for the project to gain the visibility and credibility it needs in order to continue with its mostly unfunded work, the fruits of which are completely open to the public and absolutely free of charge.

It might be thought that the information found in this website does not need to be cited because it is found online. Or because it is part of the received wisdom of the field. Although we appreciate the recognition implicit in the latter, we strongly disagree with both of these rationales, and much prefer to be explicitly recognized for our labors. As a matter of fact, we expect as much. 

Continued use of this website implies agreement with our views. 

To cite a PESSCA artwork, please write the word PESSCA followed by a space and the item number for the artwork. The item number for an artwork is a number followed by one or more capital letters. Thus, valid citations of PESSCA artworks would be as follows: 


    • PESSCA  1333A.
    • PESSCA  1992B.


To cite a PESSCA correspondence between two artworks, please write the word PESSCA followed by a space and the item numbers for the two artworks (separated by a slash). Valid citations of PESSCA correspondence would thus be as follows:


    • PESSCA 1333A/1992B.


Online publications are encouraged to link to PESSCA artworks or correspondences. To do so, please link to valid citations of artworks or correspondences as follows.



Kindly introduce citations by mentioning our name (Project for the Engraved Sources of Spanish Colonial Art), our acronym PESSCA, in parentheses, and our URL (

Please note that the PESSCA website is being constantly updated. It is therefore advisable to include in your citations the dates of last consultation.