The Austrian Monarchy refers to the historical realm ruled by the Habsburg dynasty, which dominated much of Central Europe from the late Middle Ages until the early 20th century. This monarchy included territories such as Austria, Hungary, and parts of Italy, Czech Republic, and Slovakia. The Habsburgs were known for their strategic marriages, which expanded their influence and territory. The monarchy reached its peak during the Austro-Hungarian Empire, established in 1867, which unified the Austrian and Hungarian lands under a dual monarchy. This political structure lasted until the end of World War I in 1918, when the empire dissolved, leading to the formation of several independent nations.