Anant Sadashiv Altekar (1898–1960;Devanagari: अनंत सदाशिव आळतेकर) was a historian, archaeologist, and numismatist from Maharashtra, India. He was the Manindra Chandra Nandi Professor and Head of the Department of Ancient Indian History and Culture at Banaras Hindu University in Varanasi, India, and later the director of the Kashi Prasad Jayaswal Research Institute and University Professor of Ancient Indian History and Culture at the University of Patna, both in Patna, India.
In 1936, at the invitation of the local government, he conducted an archaeological and historical survey of Kotah, and made many discoveries there, including the excavation of many old forts and temples; the most important of his discoveries from this expedition were three stone pillars dated to the year 295 of the Vikrama Era (AD 238), the second-oldest Vikrama inscriptions known. From 1951 to 1955 he led another excavation at Kumhrar, under the auspices of the Jayaswal Institute; his discoveries there confirmed the theories of D. B. Spooner that the site, which Altekar described as "probably the earliest huge stone-pillared structure to be built by Indian architects", was a relic of the Maurya Empire. On display at the Patna Museum is a casket excavated by Altekar at a Buddhist monastery near Vaishali in 1958, said to contain the ashes of the Buddha.
Altekar corresponded in 1932 with Gandhi concerning Hinduism and the untouchable castes. His 1934 book Education in Ancient India provided a comprehensive review of all aspects of education in India until around AD 1200, with some additional treatment of topics up to the start of the British Raj. In his book, Altekar collected extensive historical information on education in India from Sanskrit, Brahminic, Pali and Buddhist literature, along with inscriptions and accounts by foreign travellers. He also included defects in his study in the last chapter. In the book, Altekar proposes a theory of steady decline in Indian literacy from an earlier golden age, which later scholars such as Hartmut Scharfe dismissed as "sheer phantasy". Scharfe called Altekar an apologist, that his anti-British theory may have been influenced by his participation in the freedom struggle against British colonialism in 1930s when the book was first published. Scharfe acknowledges Altekar collected useful historical information.