The tombs of mediaeval knights sometimes include an effigy of the knight laid to rest, and it's been suggested the posture reveals something of their life and death.
For example, a sword on their chest means they died in battle, and the legs crossed over means they went on crusade, etc.
Elizabeth Chadwick explores the subject here:
The History Girls: CROSS YOUR LEGS AND HOPE TO DIE: What those effigies are really telling you by Elizabeth Chadwick
Her conclusion? There is no standard code behind the postures, and they reflect nothing more than artistic style in fashion at the time.
For example, a sword on their chest means they died in battle, and the legs crossed over means they went on crusade, etc.
Elizabeth Chadwick explores the subject here:
The History Girls: CROSS YOUR LEGS AND HOPE TO DIE: What those effigies are really telling you by Elizabeth Chadwick
Her conclusion? There is no standard code behind the postures, and they reflect nothing more than artistic style in fashion at the time.