Who was elected elected President of Germany in 1925 and whose death led to the referendum on merging the posts of Chancellor and President?
Paul von Hindenburg Paul Ludwig Hans Anton von Beneckendorff und von Hindenburg (   ), known generally as Paul von Hindenburg (] ; 2 October 1847 – 2 August 1934) was a German military officer, statesman, and politician who largely controlled German policy in the second half of World War I and served as the elected President of Germany from 1925 until his death in 1934. He played the key role in the Nazi "Seizure of Power" in January 1933 by appointing Adolf Hitler chancellor of a "Government of National Concentration", even though the Nazis were a plurality in cabinet.
Otto Christian Archibald von Bismarck Otto Christian Archibald, Prince von Bismarck (25 September 1897 in Schönhausen, Brandenburg – 24 December 1975) was a German politician and diplomat, and the Prince of Bismarck from 1904 to his death.