For the broken nose part - apparently the belief at the time was that the nose of the statue could give life to the spirit of the dead person it represented (by

For the broken nose part - apparently the belief at the time was that the nose of the statue could give life to the spirit of the dead person it represented (by inhaling incense?) So, by breaking the nose off, tomb robbers 'kill' the statue's ability to bring back the spirit and thus avoid their ire. I always thought it was the phallic symbolism