Lorenzo Ghiberti (English Wikipedia)

See Laurie Schneider Adams, Italian Renaissance Art, (Boulder, Colorado: Westview Press, 2001), 60. Actually, at the time of the 1401 competition the Florence baptistry needed two portals to be decorated. The aim of the 1401–02 competition was to begin work on this project. See also Monica Bowen, "Ghiberti's North Doors," from Alberti's Window, July 24, 2010.

all-art.org

Scott, Leader (1882). "Chapter III. Baptistery Doors". Ghiberti and Donatello. London: Sampson Low, Marston, Searle, & Rivington. p. 65.

Renaissance Jewels and Jeweled Objects, Baltimore Museum of Art, 1968, p. 29: "Lorenzo Ghiberti (1378-1455) began his career under the goldsmith Bartoluccio di Michele ... Antonio del Pollaiuolo (1433-1498) was also a pupil of Bartoluccio di Michele..."

Bloch, Amy (2009-06-01). "Baptism and the frame of the south door of the Baptistery, Florence". Sculpture Journal. 18 (1): 24–37. doi:10.3828/sj.18.1.3. ISSN 1366-2724.
A. Mark Smith (2001), "The Latin Source of the Fourteenth-Century Italian Translation of Alhacen's De aspectibus (Vat. Lat. 4595)", Arabic Sciences and Philosophy, 11, Cambridge University Press: 27–43 [28], doi:10.1017/s0957423901001035, S2CID 170587522

"Florence Baptistery - North Door - The Panels". www.guildofthedome.com. Retrieved 2018-04-24.
"The North Door Panels". www.guildofthedome.com. Retrieved 2018-04-24.
"The North Door Panels". www.guildofthedome.com. Retrieved 2018-04-24.
"The North Door Panels". www.guildofthedome.com. Retrieved 2018-04-24.
"The North Door Panels". www.guildofthedome.com. Retrieved 2018-04-24.
"The North Door Panels". www.guildofthedome.com. Retrieved 2018-04-24.
"The North Door Panels". www.guildofthedome.com. Retrieved 2018-04-24.
"The North Door Panels". www.guildofthedome.com. Retrieved 2018-04-24.
"The North Door Panels". www.guildofthedome.com. Retrieved 2018-04-24.
"The North Door Panels". www.guildofthedome.com. Retrieved 2018-04-24.
"The North Door Panels". www.guildofthedome.com. Retrieved 2018-04-24.
"The North Door Panels". www.guildofthedome.com. Retrieved 2018-04-24.
"The North Door Panels". www.guildofthedome.com. Retrieved 2018-04-24.
"The North Door Panels". www.guildofthedome.com. Retrieved 2018-04-24.
"The North Door Panels". www.guildofthedome.com. Retrieved 2018-04-24.
"The North Door Panels". www.guildofthedome.com. Retrieved 2018-04-24.

Scott, Leader (1882). Ghiberti and Donatello, with other early Italian sculptors. New York. hdl:2027/wu.89054196423.

Julian Bell (2007). Mirror of the World: A New History of Art (1st paperback ed.). Thames & Hudson. p. 161. ISBN 978-0-500-28754-5. It is noticeable nonetheless that the casting of one column has been mistakenly overlaid over a flagellator's arm, as it were trapping his hand.

"Ghiberti". Merriam-Webster.com Dictionary. Merriam-Webster. Retrieved 1 June 2019.

A. Mark Smith (2001), "The Latin Source of the Fourteenth-Century Italian Translation of Alhacen's De aspectibus (Vat. Lat. 4595)", Arabic Sciences and Philosophy, 11, Cambridge University Press: 27–43 [28], doi:10.1017/s0957423901001035, S2CID 170587522

Bloch, Amy (2009-06-01). "Baptism and the frame of the south door of the Baptistery, Florence". Sculpture Journal. 18 (1): 24–37. doi:10.3828/sj.18.1.3. ISSN 1366-2724.