Menger sponge
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In mathematics, the Menger sponge is a fractal curve. It is a three-dimensional generalization of the two-dimensional Sierpinski carpet. It was first described by Karl Menger in 1926, in his studies o
An illustration of the iterative construction of a Menger sponge up to M3, the third iteration
One of the MegaMengers, at the University of Bath
A model of a Tetrix viewed through the center of the Cambridge Level-3 MegaMenger at the 2015 Cambridge Science Festival
3D-printed model Jerusalem cube
Jerusalem cross
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The Jerusalem cross, also known as the five-fold cross, the cross-and-crosslets or the Crusader's cross, is a heraldic cross and Christian cross variant consisting of a large cross potent surrounded b
Menger sponge
…into a cube. The construction is similar to the Menger sponge but with two different-sized cubes. The name comes from the face of the cube resembling a Jerusalem cross pattern. The construction of the Jerusalem cube can be described as follows…
The Jerusalem cross on a silver coin of James II of Cyprus (1463–1473)
The Jerusalem cross on a red (rather than silver) shield as the coat of arms of Godfrey of Bouillon in a 14th-century miniature.
Godfrey of Bouillon in a fresco of the Nine Worthies at the Castello della Manta, c. 1420.
Detail of the 1339 Dulcert chart, showing Georgia and its flag