Revolutionary sentiments were stoked in 1872 after three activist Catholic priests were executed on weak pretences. This would inspire a propaganda movement in Spain, organized by Marcelo H. del Pilar, José Rizal, Graciano López Jaena, and Mariano Ponce, lobbying for political reforms in the Philippines. Rizal was eventually executed on December 30, 1896, on charges of rebellion. This radicalized many who had previously been loyal to Spain. As attempts at reform met with resistance, Andrés Bonifacio in 1892 established the militant secret society called the Katipunan, who sought independence from Spain through armed revolt.