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.
Christian Wulff Christian Wilhelm Walter Wulff (] ; born 19 June 1959) is a German politician and lawyer. He served as President of Germany from 2010 to 2012. A member of the Christian Democratic Union, he served as Prime Minister of the state of Lower Saxony from 2003 to 2010. He was elected President in the 30 June 2010 presidential election, defeating opposition candidate Joachim Gauck and taking office immediately, although he was not sworn in until 2 July.