[3] As a member of the Central Youth Committee of the POUM, she developed an intense propaganda activity alongside Andreu Nin and Wilebaldo Solano.
[8] After the murder of her husband Joan Hervàs on the Aragon Front, in March 1938, in the midst of repression against the POUM, Pilar Santiago was arrested and after going through several checks, she was admitted to the Women's Prison of Les Corts until August 13, when she was released.
[2] The Barcelona City Council, as part of the plan to feminize the citizen nomenclature, agreed at the Sant Andreu district plenary on May 5, 2024, to dedicate a passage, located in the Sagrera neighborhood, between Carrer Concepció, to Pilar Santiago Bilbao Arenal and Avinguda Meridiana.
[12][13] In 1997, the activist Llum Ventura, then councilor of the Ciutat Vella district, together with Pilar Santiago and a group of women older than eighty, ex-prisoners and reprisals, formed the Association Les Dones del 36 with the aim of to remind the new generations that the political and social advances that women enjoy today date from a struggle that became clear in 1931 with the advent of the Republic.
[14] Likewise, to try to ensure that history does not fall into oblivion, during the ten years that the association lasted, they held 179 talks in high schools, 35 in universities, 185 personal interviews, as well as interventions in radio programs, documentaries etc.