Einstein's theory of relativity is formulated in 4D Place, Even though not in a Euclidean 4D Place. Einstein's idea of spacetime has a Minkowski structure based on a non-Euclidean geometry with 3 spatial Proportions and 1 temporal dimension, rather than the four symmetric spatial Proportions of Schläfli's Euclidean 4D Place.Bersama dengan Situs ju