Closely allied to this is the type of the Holbein "Madonna of Burgomaster Meyer," in the Grand Ducal Castle, Darmstadt. It is true that the same pyramid is given by the head of the Madonna against the shell-like background, and her spreading cloak which envelops the kneeling donors. But still more salient is the diamond form given by the descending rows of these worshiping figures, especially against the dark background of the Madonna's dress. A second example, without the pyramid backing, is found in Rubens's "Rape of the Daughters of Leucippus," in the Alte Pinakothek at Munich. Here the diamond shape formed by the horses and struggling figures is most remarkable,--an effect of lightness which will be discussed later in interpreting the types. A third type, the diagonal, is given in an "Evening Landscape" by Cuyp, in the Buckingham Palace, London. High trees and cliffs, horsemen and others, occupy one side, and the mountains in the background, the ground and the clouds, all slope gradually down to the other side. It is a natural transition from this type to the V-shape of the landscapes by Aart van der Neer, "Dutch Villages," in the London National Gallery and in the Rudolphinum at Prague, respectively. Here are trees and houses on each side, gradually sloping to the centre to show an open sky and deep vista. Other examples, of course, show the opening not exactly in the centre. In the "Concert" by Giorgione, in the Pitti Gallery, Florence, is seen the less frequent type of the square. The three figures turned toward each other with heads on the same level make almost a square space-shape, although it might be said that the central player gives a pyramidal foundation. This last may also be said of Verrocchio's "Tobias and the Archangels" in the Florence Academy, for the square, or other rectangle, is again lengthened by the pyramidal shape of the two central figures. The unrelieved square, it may here be interpolated, is not often found except in somewhat primitive examples. Still less often observed is the oval type of "Samson's Wedding Feast," Rembrandt, in the Royal Gallery, Dresden. Here one might, by pressing the interpretation, see an obtuse-angled double-pyramid with the figure of Delilah for an apex, but a few very irregular pictures seem to fall best under the given classification. Last of all, it must be remarked that the great majority of pictures show a combination of two or even three types; but these are usually subordinated to one dominant type. Such, for instance, is the case with many portraits, which are markedly pyramidal, with the double-pyramid suggested by the position of the arms, and the inverted pyramid, or V, in the landscape background. The diagonal sometimes just passes over into the V-shape, or into the pyramid; or the square is combined with both.