Italian architect Renzo Piano has unveiled the final design for the proposed $125m Kimbell Art Museum expansion in Texas, US.
The design will add a new museum building to the west of the existing property, and feature new gallery spaces, a library and a larger auditorium with enhanced acoustics.
Half of the 85,000ft² building will be placed underground and will feature a terraced roof and an underground parking garage.
The new structure opens to a recessed, glass entrance bay and a pavilion with a large lobby, and will be equipped with a service tunnel to the existing building.
The area between the new and old building is occupied by a shallow pool with pathways.
Work on the project will begin this year and will be complete in 2013.
The original building was designed by Louis I Kahn and opened in 1972.