German sculptor Fritz Koenig died on Feb. 22, reports David Dunlap in The New York Times. In the 1960s, the Port Authority of New York and New Jersey commissioned Koenig and four other sculptors to design pieces for the World Trade Center. But, as the paper reports: "Minoru Yamasaki, the chief architect of the trade center, was his real patron, Mr. Koenig said." Designed for the World Trade Center's plaza, Koenig's bronze "Sphere" sculpture remained "in recognizable form" following the terrorist attacks on Sept. 11, 2001, and became "an interim memorial" in the city. Later this year, the sculpture is scheduled to return to the World Trade Center site. Read more at The New York Times.