During 1800–1850, the Port of Ponce became the heart of Ponce's economic control. During this time the Port, with its adjacent massive construction of commercial buildings, stores and warehouses, "became more important to the national [Puerto Rican] economy than San Juan's. By 1890 the Port was exporting 33.2% of the national production, compared with 21.2% exported from San Juan."Aida Belen Rivera Ruiz, Certifying Official, and Juan Llanes Santos, Preparer, Puerto Rico Historic Preservation Office. (San Juan, Puerto Rico) 26 February 2008. In National Register of Historic Places Registration Form. United States Department of the Interior. National Park Service. (Washington, D.C.) Page 14. Listing Reference Number 08000283. 11 April 2008.
