See? Not that you didn't believe me, but Chartreuse is a liqueur. Herbal and sweet. I know the latter because one of the local wine shops let me sample some. The problem for a lightweight like me was that this happened at 10:45am. But I've had a nap since then and am doing just fine, thank you.
In some countries, religious orders forbid drinking. In other countries, the religious orders make the drinks. If I were inclined to monastic life, I think I'd settle in the latter.