sentences:  Petar Zrinski, along the conspirators, went on a wide secret diplomatic negotiations with a number of nations, including Louis XIV of France, the Polish–Lithuanian Commonwealth, Sweden, the Republic of Venice and even the Ottoman Empire, to free Croatia from the Habsburg sovereignty.Imperial spies uncovered the conspiracy and on 30 April 1671 executed four esteemed Croatian and Hungarian noblemen involved in it, including Zrinski and Frankopan in Wiener Neustadt.The large estates of two most powerful Croatian noble houses were confiscated and their families relocated, soon after extinguished.