Lecture offered by the event "IAU at Home," promoted by the Culture and Extension Committee of the Institute of Architecture and Urbanism at the University of São Paulo, CCEx-IAU. A conversation between Sérgio Ferro and Silke Kapp, professor at EA-UFMG and responsible for the edition of *"Construção do desenho clássico"* (Construction of Classical Drawing), moderated by professor João Marcos Lopes from IAU-USP.
