Savore Sanguino is a rich and red Florentine sauce originating in the 14th century. Literally translated the name of the sauce is Taste (Savore) of Blood (Sanguino). Main ingredients were pounded raisons, cinnamon, sandal and sumac. Other possible ingredients were meat and wine. Sumac is now only used for dying and tanning of leather.
References
Savore Sanguino Wikipedia(Text) CC BY-SA