H. Ulrike Mills, a senior editor in the publishing office of the National Gallery of Art since 1987, died Oct. 20 at Sibley Memorial Hospital in Washington. She was 63 and lived in Bethesda.

The cause was cancer, said her executor and brother-in-law, Thomas Mills.

Hanna Ulrike Schwerdtner was born in Wiegboldsbur in the former West Germany and attended the Free University of Berlin. She came to the United States in 1973 and lived in Nevada and California before settling in the Washington area in 1986.

In addition to her work at the National Gallery, Ms. Mills was a freelance editor and did work for the Barnes Foundation of Philadelphia and the Brandywine River Museum in Pennsylvania.

In 2008, a book she edited, “Foto: Modernity in Central Europe, 1918 to 1945” (2007) by Matthew Witkovsky, won a prestigious European award for books about art.

Her marriage to James E. Mills ended in divorce.

Survivors include two sons, Jason M. Mills of Chico, Calif., and Todd J. Mills of Columbus, Ohio; and three brothers.

— Bart Barnes