The Atlas provides a complete overview of all major structures of the mouse brain that can be identified in Golgi preparations. The most important feature is its three-dimensional integrity since all structures and nerve tracts can be followed from one section to the next one with uninterrupted continuity. The Golgi Atlas presents a series of camera lucida drawings of the entire telencephalon and upper brain stem of the young postnatal mouse in 24 transverse, 11 sagittal and 15 horizontal planes. The drawings were prepared from selected brains stained in toto with the Golgi method, that have been serially sectioned in the three orthogonal planes. The text includes an introduction of the material and methods used for the construction of this Atlas and a survey with a complete bibliography on the previous studies made with the Golgi method in Rodents. In this account, a number of issues concerning particular anatomical details are considered in relation to the interpretations obtained by other students. Reference is made to some relevant reviews and key articles.