Verfassung von Tarnowo
Chronologically, it is the fourth constitution of Bulgaria, the first being the Tarnovo Constitution of 1879. It was immediately preceded by the two Socialist-era constitutions–the Dimitrov Constitution (named after Georgi Dimitrov), in force between 1947 and 1971, and the Zhivkov Constitution (named after Todor Zhivkov), in force between 1971 and 1991.