Padania (pəˈdeɪniə , UKalso-ˈdɑːn- , paˈdaːnja) is an alternative name and proposed independent state encompassing Northern Italy, derived from the name of the Po River (Latin Padus), whose basin includes much of the region, centered on the Po Valley (Pianura Padana), the major plain of Northern Italy. Coined in 1903 as a geographical term roughly corresponding to historical Cisalpine Gaul, the term was popularised beginning in the early 1990s, when Lega Nord, a federalist and, at times, separatist political party in Italy, proposed it as a possible name for an independent state. Since then it has been strongly associated with "Padanian nationalism" and North Italian separatism. Padania as defined in Lega Nord's 1996 Declaration of Independence and Sovereignty of Padania goes beyond Northern Italy and includes much of Central Italy, for a greater Padania that includes more than half of the Republic of Italy (161,000 of 301,000 km2 in area, 34 million out of 60 million in population). The adjective padano is derived from Padus, the Latin name of the Po River. The French client republics in the Po Valley during the Napoleonic era included the Cispadane Republic and the Transpadane Republic, according to the custom (emerged with the French Revolution) of naming territories on the basis of watercourses. The ancient Regio XI (the region of the Roman Empire on the current territory of the Aosta Valley, Piedmont and Lombardy) has been referred to as Regio XI Transpadana only in modern historiography. The terms Pianura Padana or Val Padana are the standard denominations in geography textbooks and atlases, but the derivation Padania was coined back in 1903 and popularized by a Hoepli geographical encyclopedia in 1910. Journalist Gianni Brera from the 1960s used the term Padania to indicate the area that at the time of Cato the Elder corresponded to Cisalpine Gaul. In the same years and later, the term Padania was considered a geographic synonym of Po Valley and as such was included in the Enciclopedia Universo in 1965 and in the Devoto–Oli dictionary of the Italian language in 1971.