Interesting article about Martin Casillas architect

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=14&cad=rja&uact=8&ved=0ahUKEwihkIvcrPTWAhXKSSYKHfcpDGI4ChAWCDswAw&url=http%3A%2F%2Fwww.academia.edu%2F17149305%2FMart%25C3%25ADn_Casillas_maestro_mayor_de_la_catedral_de_Guadalajara_nuevos_datos_y_consideraciones_sobre_su_vida_y_obra_en_Nueva_Espa%25C3%25B1a&usg=AOvVaw0EG_fYVqhAinZJuJ89x-cB

Lots of good info inside, including his parents and Mencia's father