This paper recognises the need to study the complex relations between spatial planning and cultural contexts in a more comprehensive way. The objective is to contribute to a theoretical basis and conceptual framework for a systematic analysis of spatial planning, that is, planning practices related to a cultural and social context, on the basis of a complex system of criteria. This may contribute to achieving a better understanding of the complex relationships between the cultural context—including the specific socioeconomic patterns and related cultural norms, values, traditions, and attitudes—and spatial planning as an operative instrument of territorial policy by introducing the term ‘planning culture’. Therefore, as culture is subtle and complex in nature and is based on fluid concepts, theoretical approaches of cultural change are also introduced to provide a more dynamic conception of planning cultures to analyse and understand recent changes in spatial planning.