In the Weimar Republic of 1919 to 1933, the term "grand coalition" was used for a coalition that included the Social Democratic Party, SPD, the Catholic Centre Party and the liberal parties Democratic Party, DDP and People's Party, DVP. Such a coalition was in power in 1923 and from 1928 until 1930, although the latter was a conglomerate of parties with somewhat conflicting interests, that banded together to as a safeguard for democracy against the radical political parties, the KPD and the NSDAP. In March 1930, the Great Coalition broke apart, with the resignation of the SPD over the contentious issue of increasing employee's national insurance contributions at a time when wages were falling.
1st, 3rd and 4th Merkel cabinet (2005–2009, 2013–2018, 2018–)
After the inconclusive result of the 2005 German federal election, neither of the traditional coalitions could form a majority government. Another possible coalition existed, comprising the SPD, Greens, and the Party of Democratic Socialism, but a desire to exclude the PDS, the successor party to East Germany's ruling Socialist Unity Party, from government led the leaders of the SPD and the CDU/CSU to agree to form a grand coalition with CDU leader Angela Merkel as chancellor and an equal number of cabinet seats for each party. The chancellor was elected on 22 November, and the 1st Merkel Cabinet took office. The second grand coalition in German history ended when, after the 2009 federal election, a coalition was agreed between the CDU/CSU and the FDP, thus forming the 2nd Merkel Cabinet. Following the 2013 election, on 27 November 2013 a third grand coalition was formed by the CDU/CSU and the SPD. Again it would have been possible to form a center-left government with the SPD, Greens, and The Left, the successor party to the PDS, but a grand coalition was formed instead. The term GroKo was named 2013 word of the year in Germany.
State level
Historically grand coalitions have been quite frequent on state level. Currently, there are only four states out of sixteen, which have never been governed by a grand coalition:
Hamburg
North Rhine-Westphalia
Saxony
Saxony-Anhalt
As of January 2020, five states are currently governed by grand coalitions:
Historically, three other grand coalition governments on state level, apart from the current governments of Baden-Württemberg and Hesse, consisting of other parties than CDU/CSU and SPD have existed: