These new images by British photographer Jim Stephenson offer a look around Herzog & de Meuron's extension to Tate Modern in London, which officially opened on Friday (+ slideshow).

The 64.5-metre-high tower creates 60 per cent more exhibition space for the London gallery, which has become one of the city's most important cultural attractions since it opened in 2000.

Called the Switch House, it features an exterior of latticed brickwork and folded surfaces, while its interior includes an assortment of overground and underground galleries, as well as a new roof terrace offering panoramic views of the city.

Swiss studio Herzog & de Meuron was invited back to design the extension, having been responsible for the original conversion of the former Bankside Power Station.
The architects' approach was to create the second set of galleries on the opposite side of the Turbine Hall ? the vast public space that forms the entrance to Tate Modern.

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These new spaces are connected with the existing galleries ? in the section of the building now referred to as the Boiler House ? via new indoor bridges on the first and fourth floors.

"We are delighted that the initial concept for Tate Modern, as envisaged at the time of the first competition in 1995, has become a reality," said Herzog & de Meuron co-founder Pierre de Meuron.
"The original cross-a...