Complex sentence: The heads of the statues are now scattered throughout the site; the pattern of damage to the heads (notably to noses) suggests that they were deliberately damaged because of belief in iconoclasm.
Split into simpler sentences: The heads of the statues have at some stage been removed from their bodies, and they are now scattered throughout the site. The pattern of damage to the heads (notably to noses) suggests that they were deliberately damaged because of belief in iconoclasm.