Ahasverus (or Ahashverosh), The wandering jew, the shoemaker of Jerusalem.

Accourding to one myth, Jesus leaned against a door to rest on his way to Golgatha, but the owner - Ahasverus - refused this. Consequently, Ahasverus was condemned to forever walk the earth.

Apparently, he is rejuvenated every thirty years. See also... fictional immortal characters, immortal