SW11 is a sculpture made of black Palissandro marble by Italian contemporary artist Mattia Bosco.

The artist's process is profoundly different to that found in traditional sculpture, in which the sculptor starts off with a block of stone - which contains the desired and imagined form within - from which he removes surplus material. In contrast, for Mattia Bosco, the sculptor's intervention is simple, confined and restricted, and aims only to draw out and purify the form already present in the stone. Form and material are thus inseparable: by nature, stone always leans towards a certain form, and is therefore already a potential sculpture.

The artist selects the rocks that fascinate him, right there in the quarries, from among the extracted fragments. Providing them with a base, he positions them vertically and then sets about making his own mark on the surface of the stone, using rotary cutters. There is a relationship of collaboration between the artist and the material: "It is not a case of man on one side and the world on the other, […] the relationship between me, who is sculpting, and the material itself, is a tussle between two parts of the world, engaging in a show of force."

This artwork is a one-off piece sold with a certificate of authenticity.