Gin is a spirit which derives its predominant flavour from juniper berries (Juniperus communis). From its earliest origins in the Middle Ages, gin has evolved over the course of a millennium from a herbal medicine to an object of commerce in the spirits industry. Gin was developed on the basis of the older Jenever, and became widely popular in Great Britain when William of Orange, leader of the Dutch Republic, occupied the British throne with his wife Mary. Today, the gin category is one of the most popular and widely distributed range of spirits, and is represented by products of various origins, styles, and flavour profiles that all revolve around juniper as a common ingredient.