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) in <a href="//commons.wikimedia.org/wiki/Milan" class="mw-redirect" title="Milan">Milan</a>, Italy.  The 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>, commemorating 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>. The latin plaque bears the text of a decree exempting from taxation 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>