The little village of Thanthirimale, 40 kms north-west of Anuradhapura city, is the site of a remarkable third century rock temple.     The settlement of Thanthirimale was probably first established in the 6th century BC by Upatissa, one of king Vijaya’s (the presumed founder of the Sinhalese nation) ministers and was called Upatissa Gama.…