LEONARDO DA VINCI (15 April 1452 - 2 May 1519) shows Beatrice d'Este (29 June 1475 - 2 January 1497) and Ludovico Sforza called il Moro (27 July or 3 August 1452 - 27 May 1508) to the Dukes of Milan locks that will expand the navigability of the canals. Detail from the base of the monument to Leonardo; high relief that illustrates the genius of hydraulic engineer. Commemorative sculptural group created by the sculptor Pietro Magni (21 October 1816 - 9 January 1877); inaugurated on 4 September 1872 in Piazza della Scala in Milan. Photography by Elena Piccini; Italy; 2019