Corinaldo is a town and comune in the Province of Ancona, within the Marche region of central Italy. As of 2005 it had a population of 5,187 inhabitants. It is noted for its well-preserved 14th-century walls, for being the birthplace of Saint Maria Goretti, and for a popular Halloween festival held every October.
This medieval and renaissance city, with the best preserved walls in the Marche (XIV-XV centuries), nearly a kilometre of fortification with doors, ramparts, towers and a crenellated spur attributed to Francesco di Giorgio Martini. The historic centre is characterised by narrow streets which in the west widen becoming more ample and irregular. Some have the aspect of a real monument like the Piaggia, or “hundred steps”, which go up to the hill summit.