BUFFALO, N.Y. — A permanent memorial honoring the 10 Black victims of a racist mass shooting at a Buffalo supermarket will feature interconnected stone pillars and arches, and a windowed building where exhibitions and events will be held, community and elected leaders announced Monday.

The design, “Seeing Us,” by Jin Young Song and Douglass Alligood, was revealed a day before the second anniversary of the attack. It was selected from among 20 submissions to the 5/14 Memorial…