Carlo Cattaneo (; 15 June 1801 – 6 February 1869) was an Italian philosopher, writer, and activist, famous for his role in the Five Days of Milan in March 1848, when he led the city council during the rebellion. Early life Cattaneo was born in Milan on 15 June 1801. He was the son of Melchiorre Cattaneo, a goldsmith, and Maria Antonia Sangiorgi. After attending school in Milan he studied law at the University of Pavia, graduating in 1824. A republican in his convictions, during his youth Cattaneo had taken part in the Carbonari movement in Lombardy. He devoted himself to the study of philosophy, with the hope of regenerating Italian people by withdrawing them from romanticism and rhetoric, and turning their attention to the positive sciences. In this period, Cattaneo met philosopher Giandomenico Romagnosi and he "was especially attracted by Romagnosi's emphasis on practical solutions and interdisciplinary work". Developing some intuitions coming from his mentor, Cattaneo expounded his ideas in a review founded by him in Milan in 1839, called Il Politecnico. He resided at the Palazzo Gavazzi from 1840 until 1848. 1848 revolution When the revolution of 1848 broke out, Cattaneo became one of the leaders of the insurrection against the Austrians, known as the Five Days of Milan (18–22 March 1848). Together with the young democrats Enrico Cernuschi, Giulio Terzaghi and Giorgio Clerici he formed a council of war which, having its headquarters at Palazzo Taverna in via Bigli, directed the operations of the insurgents. When on March 18 Field Marshal Radetzky, feeling that the position of the Austrian garrison was untenable, sounded the rebels as to their terms, some of the leaders were inclined to agree to an armistice which would give time for the Piedmontese troops to arrive (Piedmont had just declared war), but Cattaneo insisted on the complete evacuation of Lombardy. Again, on 21 March, Radetzky tried to obtain an armistice, and Durini and Borromeo were ready to grant it, for it would have enabled them to reorganize the defences and replenish the supplies of food and ammunition, which could only last another day. However, Cattaneo replied: The enemy having furnished us with munitions thus far, will continue to do so. Twenty-four hours of victuals and twenty-four hours of hunger will be many more hours than we shall need. This evening, if the plans we have just arranged should succeed, the line of the