Andreas Alföldi, for instance, argued in the 1930s that the medieval Carnival festival, in which a model boat was carried, developed from the Navigium Isidis.
Contohnya, Andreas Alföldi berpendapat pada tahun 1930-an bahwa perayaan Karnaval abad pertengahan (yang melibatkan model perahu) dikembangkan dari perayaan Navigium Isidis.