Cadernos Ultramares seeks to present Brazilian culture and thought in a qualified way, through volumes bringing together important essays by renowned authors in different areas of knowledge. Hlio Oiticica was one of the most powerful thinkers on contemporary art in Brazil. In the essays collected in this volume, Oiticica proposes and performs, as Mrio Pedrosa has said, an "experimental exercise of freedom" by presenting his most important creations, such as the Blides, the Parangols, and the Penetrveis, which allowed the artist to think in a seminal way about environmental art.