In the fourth issue dedicated to the work of Pedro Vieira de Almeida, are joint three essays and one excerpt from a book dedicated to the work of Le Corbusier, written by this author between 1965 and 2011. This book, also includes a stidy by Tiago Lopes Dias, on the same texts, entitled Ronchamp e a crise do racionalismo: uma interpretação de Pedro Vieira de Almeida [Le Corbusier, Ronchamp and the crisis of rationalism: an interpretation of Pedro Vieira de Almeida].