It depicts the history and events surrounding the Ponce massacre, which occurred in broad daylight on Palm Sunday in 1937.

The museum is housed inside the building where the event itself occurred, with one of its sections devoted to the Nationalist leader, Pedro Albizu Campos.

[3] The museum is listed in the U.S. National Register of Historic Places in as Casa de la Masacre (the Massacre House).

[4] "On March 21, 1937, Easter Sunday, this site witnessed one of the most tragic and moving events of our history: The Ponce Massacre.

The Hays Commission, created to investigate the facts, determined that what occurred at this site was a massacre provoked, in great measure, by the climate of intolerance, discrimination, and belittlement towards civil rights of the government of General Blanton Winship.

Today, on the fiftieth anniversary of that mournful event, the Institute of Puerto Rican Culture places this memorial as permanent record to the fallen, who offered their lives in defense of their ideals and of the most basic human rights.

The elimination of the party's leadership, however, stopped neither the Nationalist militancy nor Winship's repression, a situation that resulted in the violent event that took place in Ponce in 1937.

In 1937, the local committee made plans for the annual celebration of the abolition of slavery in Puerto Rico, which had taken place on March 22, 1873.

The Nationalists had received a permit for the parade, which was to take place on Palm Sunday, from Ponce Mayor José Tormos Diego's office.

But at the eleventh hour, Governor Winship instructed the new Insular Police Chief, Colonel Enrique de Orbeta, to contact Mayor Tormos and have him cancel the parade permit.

He also ordered Orbeta to increase the police force in the southern city, and to stop, "by any means necessary," any demonstration conducted by the Nationalists in Ponce.

After months of investigation that ACLU commission determined "that Governor Winship was directly responsible for the incident; that the Nationalists were exercising their basic right of freedom of speech and association; and that the killing of defenseless party members and by-standers had to be recognized as a "massacre.

In 1987, the Puerto Rico Legislature passed Joint Resolution Number 2951, designating the property a national historic landmark.