Italian artist and scenographer Edoardo Tresoldi, considered by Forbes as one of the world's most influential under 30s, has conceived an installation overlooking Barcelona's Avenida Diagonal boulevard.

The site-specific work celebrates the 25th birthday of L'Illa Diagonal, a building designed by Pritzker Prize winner Rafael Moneo and Manuel de Solà-Morales.

The 5-metre high installation, entitled Limes, represents six faces that look out from the roof of the building to the public space below.