The Architectural movements have adopted many strategies to create
architectural outcomes reflecting their thoughts, goals, concepts, and their special trends. Among these strategies is Erosen which has been tackled by different fields of study (artistic and architectural) to describe the characteristics of their physical outcomes, but it has not received sufficient investigation and analysis in the different architectural trends and this has triggered the need to carry out the
current research. The research problem discusses the issue that there is no sufficient theoretical knowledge concerning the strategy of Erosen, the mechanisms of embodying it, the degree of its realization in the architectural outcome of both the modern and postmodern
trends, and the nature of variance between them in the way of achieving
Erosen .Thus, the present research aims at investigating and explaining this variance in details. As to the methodology the research, it has been represented by a number of steps: First, the research tried to build up a theoretical framework for Erosen in architecture that clarifies its variables and detailed indicators, Second,
built he research hypotheses have been stated and the samples have been selected for both the modern and post-modern trends for the purpose of application and finally the results have been analyzed and the final conclusion have identified. The research has reached the following conclusion that there is a variance between the modern and post-modern trends in the way of applying Erosen of their architectural outcomes despite their similarity shown in the adoption of Erosen as a strategy to generate the outcome ,but the variance clearly has been
clearly shown in the method , style and the degree of achieving Erosen. While modernism has focused on the explicit Erosen and largely and excessively achieving it, postmodernism has focused on Erosen the content in a higher degree and achieving it in a moderate degree along with the adoption of both trends of certain mechanisms to embody the Erosen strategy within their outcomes and this is due to the variance between the two trends in the intellectual attitudes and objectives.