Orenstein, 96-97; see this British Museum page (页面存档备份,存于互联网档案馆) for another drawing of Roman ruins, perhaps the Colosseum, recently attributed to Bruegel
doi.org
Morra, Joanne. Utopia Lost: Allegory, Ruins and Pieter Bruegel's Towers of Babel. Art History. 2007, 30 (2): 200. doi:10.1111/j.1467-8365.2007.00538.x.
Orenstein, 96-97; see this British Museum page (页面存档备份,存于互联网档案馆) for another drawing of Roman ruins, perhaps the Colosseum, recently attributed to Bruegel