Pontida's Oath
Pontida's Oath ("Giurament de Pontida" in Lombard, "Giuramento di Pontida" in Italian) was, for the Lombard tradition, an oath made by the cities of Northern Italy to make the Lombard League on April 7, 1167. The first references of the oath are in 1500s, but it came very popular in the Italian Risorgimento as a representation of the ideas of Italian unification, today is one of the most important symbols of the regionalist-independentist party Lega Nord. Unlike Battle of Legnano, that give the date to the Lombardy Day, the Pontida's Oath is not officially celebrated by the Lombard nor Italian government, but it's only unofficially celebrated by supporters and politician of the Lega Nord.
In popolar culture
The Oath of Pontida was very popolar in the period of Risorgimento, because of its symbolism of a Nation that swear to defend its liberty. A Giovanni Berchet's poetry became popular and it was considered as an Italian symbol for a lot of years.
With the beginning of Northen League, Italianists had abandoned the tradition of the Oath that became a symbol of the regionalist party.