The document describes the three main styles of Indian temple architecture - Nagara, Dravida, and Vesara. The Nagara style originated in North India and is characterized by a cruciform plan and curved, tapering tower. The Dravida style is associated with South India and features temples with multiple sides and a pyramid-shaped tower made of progressively smaller stories. The styles differ in their plans, tower designs, and elements like pillars. Dravida temples also typically have large gopurams and boundary walls.