Inspired in part by the tattered posters on bollards throughout Christchurch's Red Zone, it was designed to evolve as it weathered, gradually revealing more detail of the layers underneath. This process took a dramatic turn last week as heavy rain and high winds tore through the city, and through the work.

Over the last 18 months, as the Gallery's programme has necessarily concentrated on outer rather than inner spaces, we've had to learn a few lessons about responding to a changing environment. One is the need to appreciate what we have while it's here; another is that things don't have to be long-running to be worth doing. In that spirit, we hope you'll come down if you can to enjoy the final moments of Tjalling's work over the next couple of weeks. After that, our redoubtable exhibitions team will take it down completely and file the remains (figuratively speaking) in a box labelled 'Lovely while it lasted'.