Grigoris Semitekolo was born in Athens in 1935. He first studied at the art workshop of Panos Sarafianos and then at the Athens School of Fine Arts, at the art workshop of Moralis. He spent time in Munich on independent studies, where in 1962 he presented for the first time his works in a solo exhibition held at the Greek Consulate. After his acquaintance with Jani Christou and his participation as a performer in works by the Greek composer that were presented in 1969 in Athens (at the Hellenic American Union), in other Greek cities, as well as in cities in Europe and America, he started working on visual art events paired with sound.

In 1985 he staged the performance “Cosmic Dissecting Room Show”, which was repeated at the 5^th Montivilliers Festival (1990) and at the Athens Concert Hall (1992). In 1993, Vassilis Vafeas made a film out of it. He was among the founding members of the Centre for Visual Arts (KET). He also worked as a stage designer, as a music editor for plays and collaborated with various artists providing the soundtrack for their works. He presented his works in several solo and group exhibitions in Greece and abroad (Germany, France, and the USA). Grigoris Semitekolo died on December 23, 2014, at the age of 79.