The Kimbell Art Museums 1972 Louis Kahn-designed building in Fort Worth, Texas, is an icon of Modern architecture. But as so many museums have found in recent years — such as the Whitney Museum in New York — it’s also too small to display its permanent collection and mount numerous temporary shows. In the case of the Kimbell, that problem will soon be in the past. Today the museum unveiled a final design by Renzo Piano Building Workshop (RPBW) for a new structure to be located to the west of the Kahn building.

Trying to forestall shrieks of horror from architecture buffs worried that the original, landmark structure will be in some way overshadowed or altered, Renzo Piano has said that his design for the new building calls for a separate structure, “the right distance for a conversation, not too close and not too far away.” The new building will nearly double the museum’s gallery space.

In a statement, Kimbell director Eric Lee said, “The Kimbell has never been able to present a major exhibition and a full display of the permanent collection at the same time. With the Piano building in place, this becomes possible. And with the Piano building serving as a showcase for changing exhibitions, the Kahn building becomes home to our own extraordinary collections.”