This panel is from the altarpiece of Saint Andrew, which Joan Bastida commissioned for that saint’s chapel in Barcelona Cathedral. By locating the gilded idol on a complex structure in the centre, the artist could arrange the two groups in the composition on either side of it: on the left is the enthroned proconsul with two other male figures and on the right is the captured Saint Andrew with the soldiers and executioners who lead him into the proconsul’s presence.