The Casa del Obrero Mundial (lit. 'House of the World Worker') or COM was a libertarian socialist and anarcho-syndicalist worker's organization located in the popular Tepito Barrio of Mexico City, founded on September 22, 1912. One of its founders was Antonio Díaz Soto y Gama, one of the founders of the Liberal Party of Mexico (PLM) and later a secretary in Emiliano Zapata's army.[1][2] COM served as a cultural institution promoting worker's education and social transformation through a rationalist, socialist orientation, and as the headquarters for a number of syndicates and unions on a mutual aid basis.[3]