A dense white grid made up of 27,000 elements has just gone up in London's Kensington Gardens: It's the Serpentine Gallery's 2013 summer pavilion, designed by Japanese architect Sou Fujimoto.

The pavilion originated in 2000 to host the gallery's annual fundraising party, talks and daytime visitors over a three-month period. Previous designers include Pritzker Prize winners Zaha Hadid (2000), Rem Koolhaas (2006), Frank Gehry (2008), Jean Nouvel (2010) and Peter Zumthor (2011).

At 41, the Tokyo-based Fujimoto is the youngest chosen.