Relics - G

Galileo's Fingers = Galileo's missing his middle finger, which is no small amount of irony considering his personality. 
Genghis Khan's Bones = The famous (or infamous) warlord of the Mongol hordes was buried after his death in a remote, unknown location. Those who built his tomb and buried were subsequently executed, so that his resting place would remain a secret. If even one of his bones were recovered it would undoubtedly perform some feat which gave the Conquistador an edge in battle (like summoning shades of the dead Mongol warriors to fight on the material plane again?).