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
Year of the Elephant Empire overthrew the Aksumite-affiliated rulers in Yemen around 570. The year is also recorded as that of the birth of ‘Ammar ibn Yasir. According to early Islamic historians such as Ibn Ishaq, in honor of his ally, Negus Abraha built a great church at Sana'a known as "al-Qullays", a loanword borrowed from "church". Al-Qullays gained widespread fame, even gaining the notice of the Byzantine Empire. The pagan Arab people of the time had their own center of religious worship and pilgrimage in Mecca, the Kaaba. Abraha attempted to divert their pilgrimage to al-Qullays and appointed a man named Muhammad ibn