A column typically consists of three main parts: the base, the shaft, and the capital. The base supports the column and distributes the load to the foundation, often featuring a decorative design. The shaft is the elongated vertical section, which can be fluted or smooth, and varies in thickness and tapering depending on the column style. The capital is the topmost part of the column, providing a transition to the supported structure, such as a beam or an architrave, and often features intricate detailing or ornamentation.

Columns were ornately decorated in the past as a reflection of cultural and artistic values. They conveyed a sense of grandeur, elegance, and sophistication, reflecting the social status and power of the building's owner. Ornamentation also showcased the craftsmanship and creativity of the artisans who crafted the columns, often depicting mythological or historical scenes or patterns. Columns played a significant role in defining the architectural style and conveying symbolic meaning through their decorative elements.

Walls are versatile structures that can be classified into various types based on their function and construction. Load-bearing walls are integral to a building's structure, supporting the weight above them, while partition walls are used to divide spaces without bearing any load. Shear walls are crucial in providing lateral support to buildings, particularly in earthquake-prone areas. Retaining walls are engineered to hold back earth and maintain different levels of soil. Boundary walls define property lines and offer security. Additionally, cavity walls consist of two parallel walls with an airspace in between for insulation, and veneer walls are non-structural, providing a decorative surface.

In the future, walls are likely to become more adaptive and multifunctional. Smart walls with integrated technology could regulate temperature, lighting, and even display information or images. Modular and movable walls may facilitate adaptable living spaces. The use of sustainable materials like rammed earth or recycled plastics could be prevalent. Transparent solar panels might be integrated into walls for energy generation. Additionally, advances in 3D printing technology could revolutionize how walls are constructed, making it faster and more cost-effective.