Misc: Who was the male star of the 1998 'blockbuster' film Titanic?

Questions

In 1946 ---------- went out of business, replaced by the U.N. ?

In 1949 ---------- Republic comes into existence. ?

In 1956 ---------- marries Prince Rainier of Monaco (civil ceremony). ?

In 1980 Nation of ---------- founded (formerly Rhodesia). ?

In 1529 In Germany at the ------------- (Speyer), a document signed by Lutheran leaders in fourteen cities lodged a "protest" which demanded a freedom of conscience and the right of minorities. Henceforth, the German Lutheran Reformers were known as "Protestants." ?