Secret conspiracy organizations flourished under the French Restoration from 1815 to 1830

Evidence

The secret conspiracies, which subsequently spread so widely in Italy prior to 1848, must have developed in France after Thermidor among the second-rank followers of Jacobinism: with great difficulty in the Napoleonic period on account of the vigilant control of the police; with greater facility from 1815 to 1830 under the Restoration, which was fairly liberal at the base and was free from certain preoccupations. In this period, from 1815 to 1830, the differentiation of the popular political camp was to occur. — Antonio Gramsci, Selections from the Prison Notebooks, 964