From the early 1950s Antoni Tàpies explored materials of art making, mixing paint with impoverished matter, such as detritus or earth. Later, he incorporated ordinary found objects into his works, such as the rag and string found here. In its simplicity and frontality this composition resembles a stained concrete wall, which might also allude to the mutilated public walls that Tàpies saw in his youth during the Spanish Civil War.