True Resurrection

As resurrection, plus remains aren't needed.

A sprinkle of holy water and diamonds worth a total of at least 25,000 gp.

You restore life to a deceased creature. You can raise a creature that has been dead for no longer than 10 years per caster level. In addition, the subject's soul must be free and willing to return. If the subject's soul is not willing to return, the spell does not work; therefore, a subject that wants to return receives no saving throw.

Upon completion of the spell, the creature is immediately restored to full hit points, vigor, and health, with no loss of prepared spells.

This spell can even bring back creatures whose bodies have been destroyed, provided that you unambiguously identify the deceased in some fashion (reciting the deceaseds time and place of birth or death is the most common method).

You can revive someone killed by a death effect or someone who has been turned into an undead creature and then destroyed. This spell can also resurrect elementals or outsiders, but it can't resurrect constructs or undead creatures.

Even true resurrection can't restore to life a creature who has died of old age.