Building architecture is what makes a building unique. It is how buildings relate to their environment, and the character they express through physical forms, materials, spaces and geometry. Building architecture includes the design and arrangement of the buildings structural elements (i.e. columns, beams and floor slabs) as well as non-structural elements such as cladding (exterior or interior finishes), landscaping, paving materials that cover urban or rural ground spaces - not just roofs or facades.