“She could be a Quaker girl who’s just come in from riding,” Andrew Wyeth said of Maga’s Daughter, his 1966 bust-view portrait of his wife, Betsy James Wyeth. Posed with head turned, her raven hair under a flat Quaker hat, her neck strong and beautiful, she is American elegance personified, the powerful woman behind the beloved artist. People could be daunted by Betsy, but those who knew her say she was shy, fun, stylish, a man’s woman, and totally devoted to Andrew. She was also a devoted maker of environments who restored and adapted historic buildings, oversaw the design of new structures, and had a collecting practice that transformed interior spaces. This show at the Farnsworth focuses on Betsy’s “built environments in Maine.” It explores the James family ties to the region and her building projects in the area, including the purchase and restoration of the Olson House (the setting for Christina’s World) as a gallery for Andrew’s work. —Laura Jacobs