Einstein's Theory of relativity is formulated in 4D space, While not inside a Euclidean 4D Place. Einstein's concept of spacetime incorporates a Minkowski composition according to a non-Euclidean geometry with 3 spatial Proportions and 1 temporal dimension, in lieu of the 4 symmetric spatial Proportions of Schläfli's Euclidean 4D House. https://ctmitalia.net/