Magnate conspiracy

The Magnate conspiracy (also known as the Zrinski–Frankopan Conspiracy (Croatian: Zrinsko-frankopanska urota) in Croatia, and the Wesselényi conspiracy (Hungarian: Wesselényi-összeesküvés) in Hungary, was a plot among Croatian and Hungarian nobles to oust the Habsburg Monarchy from Croatia and Hungary, in response to the Treaty of Vasvár in 1664. This treaty – which ended the Fourth Austro-Turkish War – was highly unpopular in the Military Frontier, and those who were involved in the conspiracy intended to reopen hostilities with the Ottoman Empire after they broke away from Habsburg rule.

The attempted coup against Leopold I was led by the Hungarian count Ferenc Wesselényi, the Croatian viceroy Nikola Zrinski, his brother and heir Petar Zrinski, and Petar Zrinski's brother-in-law Fran Krsto Frankopan.

The Zrinski brothers and their associate Fran Krsto Frankopan were motivated, not only by anger over Emperor Leopold's recent peace agreement with the Ottomans, but even more so by his preference for paying more attention to Western Europe while leaving much of Hungary and Croatia under Turkish rule.

Similarly to many other European Governments during the 17th century, the Imperial Court was increasingly centralising the administration of the state so they could introduce a more consistent policy of both mercantilism and absolute monarchy. Similarly to 16th- and 17th-century France, the main obstacle towards a more centralized government was the military and political power and de facto independence of the wealthiest nobles. Instead of succeeding, the Magnate's poorly organized attempt at a regime change revolt and their extremely foolhardy decision to seek Ottoman backing, while at the same time planning to later recapture much more of Croatia and Hungary from rule by both Sharia Law and the House of Osman, caused the Magnate's plans to be leaked to Emperor Leopold and caused the monarch to order a political purge and execute the conspiracy's leaders for high treason.

Causes

The expansion of the Ottoman Empire into Europe began in the second half of the 14th century leading to confrontation with both Serbia and the Byzantine Empire and culminating in the defeat of both nations in, respectively, the Battle of Kosovo (1389) and the Fall of Constantinople (1453). The expansionist policy eventually brought them into conflict with the Habsburgs a number of times during the 16th and 17th centuries. After the 1526 Battle of Mohács, the middle part of the Kingdom of Hungary was conquered; by the end of the 16th century, it was split into what has become known as the Tripartite: the Habsburg-ruled Royal Hungary to the north, the Ottoman-ruled pashaluk to the south, and Transylvania to the east.