The first documented sources mentioning the use of masks in Venice can be found as far back as the 13th century. The Great Council made it a crime for masked people to throw scented eggs. These "ovi odoriferi" were eggshells that were usually filled with rose water perfume, and tossed by young men at their friends or at young women they admired. However, in some cases, the eggs were filled with ink or other damaging substances. Gambling in public was normally illegal, except during Carnival. The document decrees that masked persons were forbidden to gamble.