Theo Laurentius has been active as a paper researcher for over fifty years. He has published several studies on watermarks and paper, including
Watermarks 1600-1650 found in the Zeeland Archives (Hes & De Graaf, 2007),
Watermarks 1650-1700 found in the Zeeland Archives (Hes & De Graaf, 2008), and
Italian Watermarks 1750-1860 (Brill, 2016).
Frans Laurentius, Ph.D., is an art historian and art dealer. He has been engaged in paper- and watermark research for over 25 years. He has also been active in archeological projects and research into the material culture in the Netherlands between 1550 and 1850. He has published several studies on graphic arts, Dutch pottery and watermarks, as well as a monograph on the Dutch print dealer Clement de Jonghe:
Clement de Jonghe (ca. 1624-1677). Kunstverkoper in de Gouden Eeuw (Hes & De Graaf, 2010).
All interested in paper, watermarks, papertrade and France.