This paper is first study on "A study on the trend of architectural thought through Weimar's spirit". The object is to make clear the peculiar character-theory in Weimar's architectural classicism, through the most important German architectural theories in the late 18th century, that are aesthete Sulzer's "AIIgemeine Theorie der schonen Kunste (1771- 74)", anonymous "Untersuchungen uber den Charakter der Gebaude(1785)" and G. Huth's essay "von der Wirkung der Baukunst auf die Veredelung der Menschen(1794)". In the short, the peculiar character-theory in Weimar's spirit is moral and educational humanity-formation by architectural beauty.
