According to our research and to the best of our knowledge, in 1840 Hacienda Maria was part of Hacienda Florida in Yauco's Barrio Barinas when my 2nd Great Grandfather Antonio Francisco Negroni Mattei acquired Florida from the Fernando Pacheco de Matos family.  In need to raise capital to operate it, it is reasonable to believe that sometime between 1840 and 1843 Antonio Francisco segregated part of Hacienda Florida, which was then one of the largest sugarcane haciendas in Yauco, and sold the newly segregated farm named Hacienda Maria to Juan Maria Antongiorgi.

 Per official records, on February 6, 1843 Juan Maria Antongiorgi received permission to use waters from the Duey and Yauco Rivers for irrigation of his Hacienda Maria.  In 1852, Juan Maria ended up owning all of what originally was Hacienda Florida when he acquired it from Antonio Francisco who had run into financial difficulties due to the construction of an irrigation system. 

 By 1885 Hacienda Maria was a sugar factory with lands totaling 700 cuerdas.  In 1896, Maria's ownership passed on by inheritance to Juan Maria's daughter Amelia Antongiorgi Paoli who was married to Juan Angel Franceschi Rodriguez.  It was later acquired by their son Alejandro Franceschi Antongiorgi. 

 By 1902 the mill was no longer in operation and the sugarcane grown in the plantation was processed at the recently established Guanica Centrale.

The series of earth tremors that affected the southern part of the island in January 2020 and several months thereafter, destroyed the structures that were left of Hacienda Maria.  The drone pictures below which were taken in December 2019 before and August 2020 after the earth tremors made available courtesy of Carlos Aleman, clearly show the devastation caused to these remains of which practically nothing is now left.  

Of the remains that were left before the earth tremors, what used to be the manor house was owned by the Claudio family who restored it and used it as a site for weddings and other activities.