Detail of the St. Andrew Altarpiece:
The Crucifixion of St. Andrew

Following a legend that St. Andrew had pronounced himself unworthy to be given a cross like Christ's, this odd image seems to have him crucified sideways.

View the entire altarpiece.
Read more about St. Andrew.

Photographed at the site by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.