Nardini Virtu Di Rabarbaro Aperitivo is a bitter liqueur made with rhubarb root, herbs, and spices. It is produced in Padua, Italy, by the Nardini family, who have been making liqueurs since 1779. Virtu Di Rabarbaro is aged for at least 12 months in oak barrels, which gives it a complex flavor profile with notes of rhubarb, gentian, licorice, and orange peel.