We construct a three dimensional domain D with the property that at least one of the following statements holds true 1) C1 (D) is not isomorphic to C 1 (Ik) for some k > 1, 2) the space Lip (Ik), k > 1, does not have bounded approximation property. Here Ik stands for the k-dimensional cube, C1 (D) is the space of smooth functions with gradient continuously extending to the closure of D, and Lip (Ik) stands for the space of Lipschitz functions on Ik.