On the third-floor mezzanine of Boston City Hall, there now stands a sobering structure: a glass house made of 700 translucent bricks. The total number of bricks depicts the average number of gun deaths per week in the United States. Inside the clear blocks, small tokens represent victims of firearm violence. Their names, alongside sonograms, bracelets, toys, photographs and other objects, reanimate victims’ memories and place viewers at eye level with each life lost.