At the beginning it was known as Plaza de San
Juan de Dios and then Plaza de San Ignacio, then replaced for the actual name in honor of the work and effort of San Pedro Claver in favor of the slaves that came from Africa and sold in Cartagena de Indias; an important slaves port at the time.
This plaza was witness of a life dedicated to a real social work, and the merciful prayers of a saint. The story says that at sundown, the saint would sit in the middle of the plaza to teach the christian faith to those who lived in a world of ignorance. The sweet and melodious voice of the slave of slaves became divine to inculcate in the heart of the unfortunate the start of a better life.