This is obviously about Louis the xvi and the french revolution aka the reign of terror. Long live the king is famous for when Louis the xvi was beheaded. The jacobians and the Girondins were fighting about executing the king. The fall of robespierre and the people fighting too. The relations of church and state in which at this time people lost their faith and thus there was christian and hebrew movements where most of the churches had lost their bishops by death or exile, when Gregory convoked at Paris a number of Bishops to regain their habit of worship. And the church of St. Peter was crowded with people the same people who had witnessed scenes of Jerusalem when the Jews returning from exile were able to regain their worship. Religion and the Reign of terror by Edmond de Pressense 1869. Look it up.