The Contemporary Lyricism of Artur Barrio in the works Work Process 4 days 4 night and Fortaleza-Lisboa intends to point some aspects of the work of this Artist, giving special attention to the performance entitled Work Process 4 days 4 nights in 1970, and also to the two installations both named Fortaleza-Lisboa, developed respectively in 2001 (Cândido Portinari gallery, Universidade do Estado do Rio de Janeiro) and 2004 (XXVI the Biennial International of Art of São Paulo). Its starting point is based in understanding of the Barrio`s poetical view, in the literary meaning of the term. Such approach will be closely tied to the peculiar way it deals with the idea of similarity between art and life, also visible in his writing. So, it is from this premise that the tack between words such as IdéiaSituação (IdeaSituation) shows what always was a condition for Artur Barrio: the inseparable relationship between the things and the person. Thus, the equation Art = Life becomes relevant, even crucial to the understanding of Barrio`s artistry, which is capable to point out his workmanship both as individual poetics and as a constituting part of contemporary artistic production.