Arrangement for determining one or more rotation errors of a rotating apparatus (2; 201), in particular a rotating apparatus for a coordinate measuring machine, with respect to one or more degrees of freedom of movement, in which a real rotating movement of the rotating apparatus (2; 201) differs from an ideal rotating movement, with a test body (1; 100; 101; 102), wherein the test body comprises: - a holder (3, 300) which, together with a part of the rotating apparatus (2, 201), can be rotated about an axis of rotation (D; A; B) and which is configured to arrange or fasten the test body with respect to the axis of rotation about which the test body can be rotated for the purpose of determining the rotation error or the rotation errors, - a plurality of test elements (5, 8, 9; 5, 10; 500, 800), which are rigidly connected to the holder or are formed on the holder, wherein each of the test elements serves for determining the rotation error with respect to one or more of the degrees of freedom of movement, wherein a first of the test elements is a reflector (5; 500), which is aligned transversely to the axis of rotation and reflects radiation incident on it in a direction dependent on the rotational angle of the test body, wherein a second of the test elements is a rotationally symmetrical measurement body (8, 9; 10; 800), the axis of symmetry of which can be arranged coaxially in relation to the axis of rotation, characterized in that the arrangement comprises a plurality of sensors (73, 74, 75, 76, 77, 88; 81, 88, 741, 761; 79), which are respectively assigned to one or more of the test elements of the test body (5, 8, 9; 500, 501; 503) and are configured to measure deviations with respect to at least one of the degrees of freedom of movement, wherein the reflector is assigned an angle sensor (81, 82, 88) and/or a distance sensor (741, 761), wherein a rotation of the test body about an axis of rotation (D; B) of the rotating apparatus (2; 201) and/or a rotation of the test body about one or more axes that are transverse to the axis of rotation (D, A, B) and/or an unchanging position of the test body can be sensed by the angle sensor, and a translational error can be determined by the distance sensor by measuring the distance between the reflector (500, 501) and the distance sensor (741, 761), wherein the rotationally symmetrical measurement body (8, 9; 10; 800) is assigned distance sensors (73, 74, 75, 76, 77), with which (73, 74, 75, 76, 77) translational deviations in directions transverse to the axis of rotation (D; A; B) can be determined. - a holder (3, 300) which, together with a part of the rotating apparatus (2, 201), can be rotated about an axis of rotation (D; A; B) and which is configured to arrange or fasten the test body with respect to the axis of rotation about which the test body can be rotated for the purpose of determining the rotation error or the rotation errors, - a plurality of test elements (5, 8, 9; 5, 10; 500, 800), which are rigidly connected to the holder or are formed on the holder, wherein each of the test elements serves for determining the rotation error with respect to one or more of the degrees of freedom of movement,