Barbastro was born in 1735 in Cariñena, Aragon, and arrived in the College of Santa Cruz de Querétaro in 1770.
[1] By 1787, Barbastro was in Mission San Pedro Aconchi, where he remained until his death on June 22, 1800.
[3] Barbastro opposed the efforts of Bishop Antonio de los Reyes to subordinate the missions to the newly created Diocese of Sonora.
[2]: 37 The conflict escalated, with complaints, appeals, and litigation on both sides; on March 13, 1785, de los Reyes imprisoned and questioned Barbastro.
Barbastro was released soon after, but the animosity continued until de los Reyes's death in 1787.