It is a piece of metal, Topos V, by the Spanish artist Eduardo Chillida Juantegui.
Commonly known as Topos, this sculpture was acquired in 1986 on the occasion of an exhibition that the Miró Foundation dedicated to Chillida.
The sculpture is made of iron with a geometric shape of a dihedral angle, closed by two sides with a semicircle counterpoint, which relate it to semicircular arches of a certain medieval air. Topos means “the place” in this case the plaça del Rei (King’s Square in English), the heart of Medieval Barcelona was what inspired the Basque artist to do his work. You can find other sculptures with which the artist embellished the city: The Mural G-333 on the Raval Quarter and the Sculpture Praise of Water on the Gracia District.