born in 1943 in the Bulgarian town Plewen, he is a former dissident. In 1953 he was involved in blowing up the Stalin monument in Sofia, for which he was sentenced to death. The sentence was reduced to twenty years’ imprisonment. He spent ten years in jail during the Schikow regime, and later studied Mathematics and worked at the computer centre in the Ministry for Domestic Trade. He fled to France in 1973. Konstantinow returned to Bulgaria in the early 1990s.