The aesthetical and cultural features of Lithuanian architecture related to Postmodernism are closely connected to socio-political, socioeconomic and sociocultural transformations at the end of the 20th century. The article presents an interpretation of modernisation-related processes, which affected and shaped the Lithuanian architecture of the late socialism. The expression of Postmodernism is analysed as an alternative to industrialization, typification and mass production. The aim of the article is to establish and analyse the social factors that have determined the appearance of postmodern architecture and its functioning in society, and to reveal ideological and aesthetical intersections of architecture, and the relationship between late socialism and Postmodernism.