The Falles or Fallas (sing. Falla) of Alzira are a celebration in commemoration of Saint Joseph in the town of Alzira, which, like the Falles in Valencia and other towns of the Valencian Community, takes place in March. Apart from the Fallas in Valencia, those celebrated in Alzira are the most important festival of this type, due to their century-old tradition, their continuing popularity, and the fact that they have the largest number of active participants (fallers), "commissions" (organised groups of fallers) and "falla monuments" (falles), seventy of which are erected in the streets of the town. The Falles of Alzira have been declared an Event of National Tourist Interest.