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.
Horst Köhler Horst Köhler (] ; born 22 February 1943) is a German politician of the Christian Democratic Union, and served as President of Germany from 2004 to 2010. As the candidate of the two Christian Democratic sister parties, the CDU and the CSU, and the liberal FDP, Köhler was elected to his first five-year term by the Federal Assembly on 23 May 2004 and was subsequently inaugurated on 1 July 2004. He was reelected to a second term on 23 May 2009. Just a year later, on 31 May 2010, he resigned from his office in a controversy over his comment on the role of the German Bundeswehr in light of a visit to the troops in Afghanistan. During his tenure as German President, whose office is mostly concerned with ceremonial matters, Köhler was a highly popular politician, with approval rates above those of both chancellor Schröder and later chancellor Merkel.