A superlative Adolf Hitler piece, his original pencil sketch of an entrance to either an exhibition building or theater hand-drawn by Hitler and given to his confidante and advisor on architectural matters, ALBERT SPEER (1905-1981), the Minister of Armaments and War Production, later convicted of war crimes at Nuremberg. The rather detailed sketch was executed by Hitler on a 11.5 x 8.25 in. sheet of beige paper. It depicts several columns, sloping sides, and three sets of steps at the front, possibly a frieze at top, and a slightly inclined roof. On the verso Speer has written: 'Halle Munchen 37' and the number ‘11’, a catalog number indicating which sketch this is one of the 125 retained by him. Speer also wrote '4.0', later amending this to '3.5', most likely the price he attached to the piece. Fine condition. Although there is no clearer indication for what structure this drawing was intended, it may have been Hitler's design for his own mausoleum to be erected on Gabelsberger Strasse in Munich, with a similar building shown in Billy F. Price’s book ‘Adolf Hitler: The Unknown Artist’, plate 660. In Speer’s memoirs ‘Inside the Third Reich’ on page 146, he discusses his collection of Hitler sketches. In part: ‘...I kept these quick sketches of Hitler’s, noting their dates and subjects, and have preserved them to this day. It is interesting that of total hundred and twenty-five such drawings, a good fourth of them relate to the Linz building project, which was always closest to his heart. Equally frequent are sketches for theaters...’. Accompanying this lot is a copy of a certificate of provenance from the grandson of Albert Speer, Berthold Speer. In 2022 Berthold sent this sketch along with approx. 30 other sketches to German militaria auctioneers Herman Historica for auction, approx. 12 of which are documented in Billy F. Price’s book ‘Adolf Hitler: The Unknown Artist’. A copy of the sale receipt is included as well. In 2022 we sold a 1980 letter by Speer in which he offered this very sketch for sale - copies of his letter and the copy of the same sketch he offered as is offered here are included as well.