Heinrich Lammasch was an Austrian jurist. He was a professor of criminal and international law, a member of the Hague Arbitration Tribunal, and served as the last Minister-President of Austria for a few weeks in October and November 1918. He was the first and only Minister-President in the Austrian half of the Habsburg Monarchy to have been a commoner, although he was not the first to have been born one by any means.

Cisleithania, officially The Kingdoms and Lands Represented in the Imperial Council, was the northern and western part of Austria-Hungary, the Dual Monarchy created in the Compromise of 1867—as distinguished from Transleithania. This name for the region was a common, but unofficial one.