<P> A coven / kʌvən / usually refers to a gathering of witches . The word "coven" remained largely unused in English until 1921 when Margaret Murray promoted the idea, now much disputed, that all witches across Europe met in groups of thirteen which they called "covens ." </P> <P> In Wicca and other similar forms of modern neopagan witchcraft, such as Stregheria and Feri, a coven is a gathering or community of witches, much like a congregation in Christian parlance . It is composed of a group of believers who gather together for ceremonies of worship such as Drawing Down the Moon, or celebrating the Sabbats . </P>

What is the optimal number for a witches coven