Chartreuse is a French liqueur made by the Carthusian Monks since the 1740s. It is composed of distilled alcohol aged with 130 herbal extracts. The liqueur is named after the Monks' Grande Chartreuse monastery, located in the Chartreuse Mountains in the general region of Grenoble in France. The liqueur is produced in a factory in the nearby town of Voiron (Isère). It is one of the handful of liquors that continues to age and improve in the bottle. Only two Chartreuse monks know the identity of the 130 plants, how to blend them and how to distill them into this world famous liqueur. They are also the only ones who know which plants they have to macerate to produce the natural green and yellow colours. And they alone supervise the slow ageing in oak casks.