Matteo di Giovanni
The Apostle Bartholomew

Circa 1480
Tempera on wood, 80.5 x 48 cm
Museum of Fine Arts, Budapest

There were different accounts of the manner of St. Bartholomew's death, but in portraits the artists always assume that he was flayed. In this example, he is presented standing completely flayed and holding his skin, which the Web Gallery of Art says was "an old Umbrian tradition."

Read more about images of St. Bartholomew.

Source: this page at Wikimedia Commons.