Diario de Manila was a Spanish language newspaper published in the Philippines, founded on October 11, 1848, and closed down by official decree on February 19, 1898, after the colonial authorities discovered that its installations were being used to print revolutionary material.

Enrique Gaspar y Rimbau, a Spanish diplomat and writer, author of plays, operas and novels, wrote for Diario de Manila while serving as consul in Hong Kong.

Baltasar Giraudier, a famous French-Filipino artist and writer who published his work in both Diario de Manila and Ilustración Filipina, accompanied Governor-General Malcampo to Jolo during an organized military expedition that took place in February 1876 against Muslim pirates who had been receiving a substantial amount of arms and ammunition during the previous years.

Camilo Millán y Villanueva, former governor of several provinces in the Archipelago and government adviser, raised the issue of the reforms for the Philippines in an article published in 1897 titled "El gran problema de las reformas en Filipinas".

Sister Teresa, in turn, sought the advice of Father Mariano Gil, the parish priest of Tondo, who, accompanied by several Guardia Civil, immediately searched the premises of Diario de Manila and found evidence of the Katipunan’s existence.