The long slender stained-glass window in the Allegheny Cemetery in Pittsburgh, displays a crown and cross in a purple quatrefoil. The quatrefoil in Christian symbolism represents the four evangelists—Matthew, Mark, Luke, and John—and is often found in the tracery of Gothic Churches. 

Even the color of the glass surrounding the motif is significant.  Purple was the color that signified royal authority.  It also represents the suffering and mourning associated with the Passion of Christ. During the Passion of Christ, Roman soldiers placed a purple robe around Jesus and crowned him with thorns mocking Him. The color purple is also a reminder to Christians of Jesus’s suffering and their need to confess their sins and seek forgiveness.

The crown is a symbol of glory and victory over death.  The reward awaits in Heaven where the victor will receive a crown of victory. The cross represents the suffering of Christ and is a universal symbol of Christianity.