The words itihāsaṁ purātanam mean “an old history.” The Purāṇas are not chronologically recorded, but the incidents mentioned in the Purāṇas are actual histories of bygone ages. Śrīmad-Bhāgavatam is the Mahā-Purāṇa, the essence of all the Purāṇas. The Māyāvādī scholars do not accept the Purāṇas, but Śrīla Madhvācārya and all other authorities accept them as the authoritative histories of the world.