Perboyre was a French missionary in China and of course one of their main teachings was how Christ died on the cross for the peoples sins so when Christianity was outlawed in China the missionaries were executed in the same way.
Signed, titled and dated on bottom front:
Martiro de B. Juan Gabriel Perboyre Por Jose Q Caro
El 11 de Septiembre de 1840 año de 1840
39” tall by 30” wide including original frame
