Mario Merz began working with igloos in 1968. For the artist this structure materialized absolute cosmic space, in which man is the protagonist. The igloo lends form to the entire world and the house, to private space and all reality. In "Untitled (Triple Igloo)", the numbers in the series developed by the mathematician Fibonacci in the thirteenth century – used to measure the growth of leaves, skin and organic minerals – are realised in neon and together with the three igloos, one inside the other, allude to the evolution of the cosmos and man, to the vital impulses and energies that animate the universe. The work is largely realised with sheets of glass, a fragile, transparent material. The piece inspires a reflection on the precariousness of existence, on the natural instinct for protection and on the need to establish contact with the outside world.