My grandmother told us that when she was young and living in Mexico the president closed the churches. Priests and nuns could not be seen in their traditional clothing in public. We visited a former convent in Puebla that had a large collection of art as well as hiding places where the nuns lived during this period. Some of the hidden rooms had slots so that the church across the street could be seen. In a graphic, religious, respectful way (that I thought was very Mexican) this is a monument containing the heart (in the round glass thing) of a priest that helped to keep the convent open during this period.