Tate Modern hopes to grow

London’s Tate Modern museum, which draws about 4 million visitors a year, will seek to raise about $254 million in the next four years to fund an expansion, said Nicholas Serota, head of the Tate museums.

The Tate Modern rehired the Basel, Switzerland-based architects Herzog & de Meuron to plan the expansion of galleries, educational facilities and surrounding areas on the museum’s 8-acre site, Serota said at a news conference Thursday. The cost, which will probably be covered mostly by private donors, will be about the same as it took to complete the Tate Modern in 2000, he said.