80s Films: Out of ___?

Questions

In a suit of armour which part of the body is protected by a greave?

Name given to a positive electrode?

Which classic 1939 Hollywood film derives from Maupassants Boule de Suif?

What is the name given to an outwork which defended the entrance of a castle or fortified town?

In which european city is the International Museum of the Reformation which includes statues of John Knox and John Calvin?