From the placard:
One of the first robotic icons in science fiction, Maria appears in “Metropolis,” a silent German film directed by Fritz Lang and set in the year 2026 (at the time, 100 years in the future). The robot never is named in the film, but she is an attempt to make an evil mechanical duplicate of the beautiful heroine, Maria.
Maria is one of the displays at the Carnegie Center’s Roboworld, billed as the world’s largest permanent robotics exhibition. It’s very hands-on, too — so if you have kids, they’ll really enjoy it (and you can pretend you’re only there for them…).