The so-called <b><a href="//commons.wikimedia.org/wiki/Conca_di_Viarenna" class="mw-redirect" title="Conca di Viarenna">Conca di Viarenna</a></b> (Viarenna bassin) is what remains today of one of the 5 <a href="//commons.wikimedia.org/wiki/Canal_locks" class="mw-redirect" title="Canal locks">canal locks</a> used to navigate across <a href="//commons.wikimedia.org/wiki/Milan" class="mw-redirect" title="Milan">Milan</a> (Italy) and its <a href="//commons.wikimedia.org/wiki/Navigli_di_Milano" class="mw-redirect" title="Navigli di Milano">canals</a>. It was dug in 1439 by <a href="//commons.wikimedia.org/wiki/Filippo_Maria_Visconti" class="mw-redirect" title="Filippo Maria Visconti">Filippo Maria Visconti</a> upon a project by <a href="//commons.wikimedia.org/wiki/Filippino_degli_Organi" class="mw-redirect" title="Filippino degli Organi">Filippino degli Organi</a> and <a href="//commons.wikimedia.org/wiki/Aristotele_Fioravanti" class="mw-redirect" title="Aristotele Fioravanti">Aristotele Fioravanti</a>. At its end, a 1497 plaque diplaying the <a href="//commons.wikimedia.org/wiki/Coats_of_arms_of_the_House_of_Sforza" class="mw-redirect" title="Coats of arms of the House of Sforza">coats of arms of the House of Sforza</a>, commemorates the duke <a href="//commons.wikimedia.org/wiki/Ludovico_il_Moro" class="mw-redirect" title="Ludovico il Moro">Ludovico il Moro</a> and his wife <a href="//commons.wikimedia.org/wiki/Beatrice_d%27Este" class="mw-redirect" title="Beatrice d'Este">Beatrice d'Este</a>. A latin plaque can also be read, granting exhemption from taxation to all boats carrying from <a href="//commons.wikimedia.org/wiki/Lake_Maggiore" class="mw-redirect" title="Lake Maggiore">Lake Maggiore</a> the marble to build the <a href="//commons.wikimedia.org/wiki/Duomo_di_Milano" class="mw-redirect" title="Duomo di Milano">Cathedral</a>. Picture by <a href="//commons.wikimedia.org/wiki/User:G.dallorto" title="User:G.dallorto">Giovanni Dall'Orto</a>, July 24 2007.
<a href="//commons.wikimedia.org/wiki/User:G.dallorto" title="User:G.dallorto">G.dallorto</a>
Attribution
Self-published work by <a href="//commons.wikimedia.org/wiki/User:G.dallorto" title="User:G.dallorto">G.dallorto</a>