Jacopo da Trezzo
... that two slaves belonging to Don Carlos were trained by the Italian medallist Jacopo da Trezzo in his workshop in 1550s Madrid?
... that two slaves belonging to <a href="./Carlos,_Prince_of_Asturias" id="mwBKk" rel="mw:WikiLink" title="Carlos, Prince of Asturias">Don Carlos</a> were trained by the Italian medallist <b id="mwBKo"><a href="./Jacopo_da_Trezzo" id="mwBKs" rel="mw:WikiLink" title="Jacopo da Trezzo">Jacopo da Trezzo</a></b> in his workshop in 1550s Madrid?