Modern Movement s planned denial of history rendered problematic the creation of monuments, a basic architectural theme throughout its history. Besides, rational thought and belief in technics and machines to resolve social matters guided to diminishment of the importance of subjectivity and symbolism as essential aspects to architectonic creation, particularly when monumentality counted. Theoretical contributions by last century cultural agents are analyzed, especially debates that took place between the 1930 s and the 1950 s. One can notice, otherwise, that even before those debates, some architects works pointed towards the creation of monuments in pace with the spirit of their time. It is maintained in this work that the notions of monument and monumentality had to go through a reconsideration, when, accordingly to new cultural values, previously unknown or little considered aspects were taken. This process led to new notions of monument and monumentality that incorporated XX century developments and knowledge from other areas.