Pão de Ló de Ovar may be the most famous Portuguese cake, dating back to the 18th century when it was made in convents by nuns. The earliest written evidence about this sponge cake dates back to 1781, in a book called Irmandade dos Passos, where it is said that pão de Ló de Ovar was a sweet offered to the priests who took the wooden framework to carry the statues in the Holy Week procession.