Rome Foundation Day is observed in Rome, Italy, every April 21. This semi-official holiday celebrates the legendary founding of the city by Romulus and Remus, twins who were said to be suckled by a she-wolf after being abandoned. The celebration features a costumed procession and a symbolic opening of the city gates. According to the myth, Romulus founded Rome on this date, which coincides with a festival dedicated to Pales, the goddess of shepherds and livestock. The story recounts how the twins, after learning of their royal lineage, returned to Alba Longa to restore their grandfather, Numitor, to the throne before establishing their own city. The day is marked by various festivities that reflect this rich historical narrative.