k.u.k.

The abbreviation k. u. k. (or k. und k., k. & k.) stands for kaiserlich und königlich -- German for Imperial and Royal.The phrase refers to the so-called "Dual Monarchy" of Austria-Hungary from 1867 to 1918: The Emperor of Austria also reigned, in personal union, as the King of Hungary. All government acts took place in the name of "His Imperial and Royal Majesty": most of the time abbreviated to "k. u. k.". Also, all common governmental institutions and offices had a name prefixed with "k. u. k.".
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