Vastushastra is the ancient Indian science of architecture and architectural design based on principles of harmonious existence with nature. It provides rules for planning and construction of buildings based on factors like directions, elements, astronomy, and their effects on inhabitants. Vastushastra considers the placement of items, colors, and materials used and their impact on the flow of energy in a space. It identifies doshas or disturbances in energy and provides remedies like symbols, yantras, colors, sounds and other measures to enhance positive energy and neutralize negative effects.