In 2004 MACBA dedicated a retrospective exhibition to the informalist artist Antoni Tàpies, curated by Manuel J. Borja-Villel. This is the resulting catalogue, which includes a compilation of essays and fragments by authors such as Bozal, Guilbaut, Cirlot, Tapié and Tàpies himself, in which questions such as materiality and identity are dealt with and in which the complexity of the artist becomes evident.