Complex sentence: His most noted work was a base of welded iron supporting a silver krater, which, according to Herodotus, Alyattes, the Lydian King and father of Croesus, gave to the Oracle of Delphi.
Split into simpler sentences: His most noted work was a base of welded iron supporting a silver krater. According to Herodotus, it was given by Alyattes, the Lydian King and father of Croesus, to the Oracle of Delphi.