On a Friday evening in Washington, D.C., a presidential threat to demolish the Kennedy Center — a performing arts institution that has shaped American cultural life since 1971 — drew crowds to its plaza in spontaneous protest. The statement, offered without elaboration, arrived as a challenge not only to a building but to the norms that govern how a society protects what it has chosen to call significant. In the tension between executive will and civic memory, the Kennedy Center became, for one evening, a symbol of something larger than itself.