Revolutions of 1848 in the Austrian Empire even socialist currents resisted the Empire's longstanding conservatism. The events of 1848 were the product of mounting social and political tensions after the Congress of Vienna of 1815. During the "pre-March" period, the already conservative Austrian Empire moved further away from ideas of the Age of Enlightenment, restricted freedom of the press, limited many university activities, and banned fraternities. Conflicts between debtors and creditors in agricultural production as well as over land use rights in parts of Hungary led to conflicts that occasionally erupted into violence. Conflict over organized religion was pervasive in pre-1848 Europe. Tension came both from within
Revolutions of 1848 in the Austrian Empire counter-revolution in the Austrian Empire. Lombardy-Venetia was quickly brought back under Austrian rule in the mainland, even because popular support for the revolution vanished: revolutionary ideals were often limited to part of middle and upper classes, which failed both to gain "hearts and minds" of lower classes and to convince the population about Italian nationalism. Most part of lower classes indeed were quite indifferent, and actually most part of Lombard and Venetian troops remained loyal. The only widespread support to the revolution was in the cities of Milan and Venice, with the Republic of San Marco lasting under siege until