In a move that it touts as “predestined,” the Kimbell Art Museum today announced that it has engaged Renzo Piano to design an expansion. Early in his career, the Italian architect worked for Louis I. Kahn, who designed the original structure that opened in 1972. The Kimbell is widely viewed as a masterpiece, displaying Kahn’s genius for infusing interior spaces with soft daylight. But at 120,000 square feet, the popular Fort Worth museum is now unable to house both its permanent collection of modern art as well as special exhibits. In 1998 it purchased land across the street, which will soon be home to Piano’s new building; past attempts at expanding had met with controversy.