On Palm Sunday, March 21, 1937, a pro-independence, Nationalist Party march, intended to protest the incarceration of party founder and independence icon Pedro Albizu Campos, turned deadly. Police set up a blockade to stop the march after a permit was cancelled and ended up killing 19 people, including women and children, and wounding 100 more. The confrontation took place right outside the former shoemaker’s shop that houses this facility. The museum provides a concise, unvarnished history of the modern independence movement and the official repression brought against it. The event is still marked with a ceremony each year.