Since the 1970s, Vlado Martek is one of the important figures in the unofficial art scene of Yugoslavia and who is since becoming an internationally acclaimed conceptual artist working in Croatia. His works moves between experimental poetry, performance and visual arts. His membership in the 'Group of Six', together with Mladen and Sven Stilinović, Fedor Vučemilović, Boris Demur, and Željko Jerman was central for his artistic development. The 'Group of Six' was founded in 1975 in the spirit of the 'Croatian Spring' and realized many collective actions that mostly took place in public spaces due the the restrictive institutional exhibition policy.
His work was honoured among others at the MOMA in New York, at the MUMOK in Vienna as well as in solo exhibitions at the Museum of Modern Art in Ljubljana and the Modern Art Museum in Wroclaw.