Raul Isidro (b. 1943) is a native of Calbayog in Samar. He is a product of the Fine Arts program of the University of Santo Tomas, where he finished with a degree in Advertising. At UST during the period was National Artist Victorio Edades, regarded as the leading advocate of Modernism in the country. It is not surprising that among Isidro during his time at UST were other stalwarts of the Late Modernist period, including sculptors Ramon Orlina and Eduardo Castrillo.