In 1714, Catalonia was defeated and loss its sovereignty, its self-government, its Constitution and its freedoms to an absolute king who imposed a harsh political, economic, social and cultural repression that was prolonged until the 1970s, only interrupted during a few isolated and short periods. Barcelona was one of the last cities to fall, but it was ultimately defeated on the 11th of September 1714, after a 14-month military siege. A few days after, all of Catalonia succumbed to the authority of the new dynasty, the Bourbons, who founded a Unitarian Spain, centralist and with an implacable homogenisation plan. Catalonia's National Day pays tribute to those defending Barcelona until the last day and aims to make citizens remember the loss of sovereignty and freedom. On the 300th anniversary of the defeat, and in the middle of the current self-determination process, the institutional celebrations were particularly symbolical and unique.