Witches' Sabbath (The Great He-Goat) whose full-length portrait appears in the same series. As with the other "Black Paintings", Goya began with a black background which he painted over with lighter pigments, then with broad, heavy brushstrokes of grey, blue and brown. The darker areas were achieved by leaving the black under-paint exposed; this is most obvious in the figure of the Devil. Like the other works in the series, "Witches' Sabbath" is worked up through heavy, slashing brushstrokes. The plaster was underlaid with thick carbon black before the paint was applied in hues of white lead, Prussian blue, vermilion of mercury, and crystals of
Witches' Sabbath to the witches' equivalent to the Christian day of rest; a more common term was "synagogue" or "synagogue of Satan" possibly reflecting anti-Jewish sentiment, although the acts attributed to witches bear little resemblance to the Sabbath in Christianity or Jewish Shabbat customs. The "Errores Gazariorum" ("Errors of the Cathars"), which mentions the Sabbat, while not discussing the actual behavior of the Cathars, is named after them, in an attempt to link these stories to an heretical Christian group. Christian missionaries' attitude to African cults was not much different in principle to their attitude to the Witches' Sabbath in Europe; some