"A-Z of Art Movements." A-Z of Art Paintings: Visual Arts. Accessed May 2021. http://www.visual-arts-cork.com/painting/chiaroscuro.htm.

"Antique Map Categories," Barry Lawrence Ruderman Antique Maps, Inc. 2017, accessed February 2021. https://www.raremaps.com/category/Maps/World/World

Ashton, Mark. "Allegory, Fact, and Meaning in Giambattista Tiepolo's Four Continents in Würzburg." The Art Bulletin 60, no. 1 (1978): 109-25, doi:10.2307/3049749.

Bannister, David, and Carl Moreland. Antique Maps: A Collector’s Handbook. London; New York: Longman, 1983.

"Cartes-à-figures, a Short-lived Fashion Promoted by Blaeu and Hondius by Blaeu, Hondius, Kaerius, Hogenberg, Visscher." CartaHistorica. June 10, 2020, accessed April 2021. https://www.cartahistorica.com/blog/journal/cartes-a-figures-a-short-lived-fashion-promoted-by-blaeu-and-hondius/.

"Complete Dictionary of Scientific Biography." Ortelius (Or Oertel), Abraham. August 13, 2018, accessed February 2021. https://www.encyclopedia.com/people/science-and-technology/geography-biographies/abraham-ortelius.

Fraim, John. Symbolism.Org: Symbolism of Place: 4. The Place of Time. 2001, accessed April 2021. http://www.symbolism.org/writing/books/sp/4/page2.html

Joseph, William. "Wit, Frederick De." Mapmakers: Frederick de Wit. Accessed February 2021. https://www.crouchrarebooks.com/discover/mapmakers/wit-frederick-de.

Koks, Frans. "Ortelius Atlas." Ortelius Atlas: General Atlases: Articles and Essays: General Maps: Digital Collections: Library of Congress. Accessed February 2021. https://www.loc.gov/collections/general-maps/articles-and-essays/general-atlases/ortelius-atlas/.

Lauterbach, Christiane. "Masked Allegory: The Cycle of the Four Seasons by Hendrick Goltzius, 1594-95." Simiolus: Netherlands Quarterly for the History of Art 31, no. 4 (2004): 310-21. doi:10.2307/4150596.

"The Life of Willem Jansz. Blaeu." Antique Maps, Old Prints, Medieval Manuscripts, Auction and Gallery. August 27, 2017, accessed March 2021. https://www.swaen.com/Willem-Blaeu-antique-map.php.

Mark, Joshua J. "The Seven Wonders." World History Encyclopedia. Last modified September 02, 2009, accessed April 2021. https://www.worldhistory.org/The_Seven_Wonders/.

Oostindie, Gert, and Bert Paasman. 1998. “Dutch Attitudes towards Colonial Empires, Indigenous Cultures, and Slaves.” Eighteenth-Century Studies 31 (3): 349. doi:10.1353/ecs.1998.0021.

Rother, Grace, Sarah Helm, and Erin Platte. "A Brief History of Color in Maps." Omeka RSS. 2021, accessed May 2021. https://apps.lib.umich.edu/online-exhibits/exhibits/show/the-geography-of-colorants/a-brief-history-of-color-in-ma.

Rumsey, David. "David Rumsey Map Collection." Cartouches, or Decorative Map Titles. February 25, 2010, accessed May 2021. https://www.davidrumsey.com/blog/2010/2/25/cartouches-decorative-map-titles.

Sheposh, Richard. “Dutch Golden Age.” Salem Press Encyclopedia. 2019, accessed April 2021. http://proxy.mul.missouri.edu/login?url=https://search.ebscohost.com/login.aspx?direct=true&db=ers&AN=133860741&site=eds-live&scope=site.

Snyder, Daniella. "Maps as Art: Using Digital Media to Bring Art and Cartography to Life." Maps as Art Using Digital Media to Bring Art and Cartography to Life. 2016, accessed May 2021. http://daniellasnyder.sites.gettysburg.edu/maps_as_art/view-map/the-four-seasons/.

"Solar System Symbols." NASA Solar System Exploration. January 20, 2018, accessed April 2021. https://solarsystem.nasa.gov/resources/680/solar-system-symbols/.

"Typus Orbis Terrarum." Barry Lawrence Ruderman Map Collection - Spotlight at Stanford. Accessed May 2021. https://exhibits.stanford.edu/ruderman/catalog/jd153tv4117.

Venable, Bradford. “The Iconologia: Helping Art Students Understands Allegory.” Art Education 61, no. 3 (2008): 15–21. https://doi.org/10.1080/00043125.2008.11652055.

Von Aue, Mary. "Abraham Ortelius: Why His Maps Included Images of Sea Monsters." Culture. May 20, 2018, accessed May 2021. https://www.inverse.com/article/45046-abraham-ortelius-why-maps-include-sea-monsters.