Agni Purāṇa

Contains encyclopedic information. Includes geography of Mithilā (Bihar and neighboring states), cultural history, politics, education system, iconography, taxation theories, organization of army, theories on proper causes for war, diplomacy, local laws, building public projects, water distribution methods, trees and plants, medicine, Vāstu Śāstra (architecture), gemology, grammar, metrics, poetry, food, rituals and numerous other topics.