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. Between 1670 and the revolution of 1848, there would be only 2 bans of Croatian nationality. The period from 1670 to the Croatian cultural revival in the 19th century was Croatia's political dark age. Meanwhile, with the victories over Turks, Habsburgs all the more insistent they spent centralization and germanization, new regained lands in liberated Slavonia started giving to foreign families as feudal goods, at the expense of domestic element. Because of this the Croatian Sabor was losing its significance, and the nobility less attended it, yet went only to the one in Hungary.