Louis I. Kahn noted the more modern aspects of decorum, in that he did not consider the direct relationship between decorum and ornaments and consequentially, beauty. He compartmentalized the definition of social order in decorum, shifting it from social order, to natural order. His theories therefore focused more on the naturally aesthetic usage of order and form. For instance, he asked what use the material elements for structure such as concrete would have. If the materials were to arrange into a room by itself, how would it come into existence and thus form a sense of natural order. Moreover, his conceptions regarding conformity to natural order in architecture assisted him in staying true to the ‘Human Agreement’, whereby a building should be able to communicate the inspiration that led to it as well as the ways in which it would serve the community. One of the ideas that interconnect decorum and civilisation can therefore be not only the ‘art’ behind designing in architecture and the usage of ornaments, but also the ways in which buildings can communicate with the people, and adapt to the changing times – remaining ornamental yet timeless. This leads to the very essence of the ideas of civilisation stemming from a much more modern approach of designing and architecture.
The following examples of buildings examine how the buildings during Macquarie period have undergone subsequent growth in order to conform to the decorum of the architecture of Sydney. In lieu of the idea of decorum that is mentioned above, civilisation, due to conformity to social order can be deduced, and civic duty of an individual can be defined. The following examples of buildings contribute greatly to a sense of nationality, and a civic and moral duty to the citizens of Sydney.