Who built C-3PO?

Anakin Skywalker

Which actress played Mia Thermopolis in the movie "The Princess Diaries"? Which famous horror story author wrote 'Frankenstein'? Mount Olympus, the highest mountain in Greece, is located on which peninsula? According to folklore in Iceland, giant creatures called Gryla have an appetite for which mischievous group? Which organ detoxifies blood from harmful substances?