London’s Tate Modern has announced that it will open its Herzog & de Meuron–designed expansion on June 17, 2016.

The new Tate Modern will feature work by more than 250 artists from 50 countries, and it will have 60 percent more display space, including a larger area for temporary exhibits. There will also be new seminar rooms and a media lab, plus a restaurant on Level 10 and a public terrace on Level 11.

Herzog & de Meuron designed the original Tate Modern , which opened in May 2000, and the façade of the new 11-story building will have the same brick as that structure. There will also be a perforated brick lattice through which interior lights will glow at night. The expansion will use 54 percent less energy and produce 44 percent less carbon than allowed by current building regulations.

In 2006 it was estimated that the new building would cost $325 million, but now the project has expanded to include renovations on the existing structure, so the new cost is $394 million. The project was financed through public and private funding. London Mayor Boris Johnson broke ground on the expansion in January 2010.

The new building will open to schoolchildren around the U.K. for a special preview on June 16.

To check the building’s progress, view the Tate Modern’s live image feed from the construction site, updated every 15 minutes.