This year marks the 150th anniversary of the Dred Scott decision, so much deserved ado will be made about the man who sued for his freedom. One lesser-known aspect of this landmark event is that Scott's wife, Harriet, also brought suit for her own freedom. You can learn more about this history-changing time Saturday through Tuesday (March 3 through 6) at the Old Courthouse (11 North Fourth Street; 314-655-1700). A new exhibit (A Legacy of Courage: Dred Scott and the Quest for Freedom) opens, the arguments of Scott's case are presented to judges, Slavery on Trial: The Dred Scott Decision is screened, there's a choir concert and that's just on Saturday! For specific program times and for information about what's happening on the other three days of the commemoration, visit www.dredscottanniversary.org. All of the events are free, and the Old Courthouse is open from 8 a.m. to 4:30 p.m. every day.