Which foundational concept governs the concept of harmonious relationships in shapes within architecture?

The foundational concept that governs harmonious relationships in shapes within architecture is the Golden section. This mathematical ratio, approximately 1.618, is often found in nature and has been utilized by artists and architects throughout history to create aesthetically pleasing proportions. The Golden section is significant because it provides a sense of balance and beauty, making it a powerful tool in design. By adhering to this principle, architects elevate their work to evoke a sense of harmony and proportionality, which is essential for creating visually engaging spaces.

Other concepts such as the grid, path, and pass-by spaces contribute to spatial organization and circulation but do not inherently focus on the ratios and relationships of shapes in the same way the Golden section does. The grid provides a structural framework but is more about organization than harmony. Similarly, path discusses movement through space, while pass-by spaces consider the experience of movement, which, while important, does not address the intrinsic relationships between shapes as directly as the Golden section does.