antiquary and colonial administrator in India, the first European scholar to decipher the edicts of the ancient Indian emperor Aśoka.

Prinsep was appointed to the Calcutta mint in 1819 but left to become assay master (1820–30) at the Benares (Vārānasi) mint. He returned to the Calcutta mint as assay master in 1832, leaving in 1838 for England because of ill health.

As secretary of the Asiatic Society of Bengal (from 1832), he had access to and developed the study of the largest collection of Indian coins (coin collecting) then existing.

Trained as an architect, Prinsep assumed responsibility for architectural projects, chiefly at Benares. He introduced a uniform coinage and reformed the Indian system of weights and measures while at Calcutta, where Prinsep's Ghat, an archway on the bank of the Hooghly, was erected to his memory.

Compilations of his writings have been published, chiefly Essays on Indian Antiquities, Historic, Numismatic, and Palaeographic, edited by E. Thomas, 2 vol. (1858).