"Along with the Cathedral - Milan's most famous and much beloved monument - the big Castle is linked to the vicissitudes and dramatic events that the city has experienced over the past centuries. For many years, in fact, it has represented a symbol of the power in the hands of the Dukes, as well as of the foreign dominators. Only at the beginning of the 20th century the Castle assumed its distinctive role, becoming a place of culture, which hosted numerous Lombard art collections. The Castle was named after Francesco Sforza, who transformed it into a ducal residence in 1450. But its origins date back to the second half of the 14th century, at the time of Galeazzo II Visconti.
Hosted inside the Castello Sforzesco is the revered Trivulziana Library. The library can be accessed to examine parchments, documents, records and prints. The Historic Archive preserves all the acts of the Municipality of Milan and of the Duchy dating back as far as 1385."I also would like to know the history, the provenance, of this particular copy of the Das Tri and how it came to reside in Italy. I have always believed that the other countries of Europe might hold some further accounts of Johann Bessler and it seems to me that a documentary about him could engage the attention of the right people to bring such information to the surface.