Regent Marie de Medici's Cipher

I found undeciphered passages in Marie de Medici's letters (1610) in BnF fr.3789 and included it in "French Ciphers during the Reign of Louis XIII" and "Unsolved Historical Ciphers".
The same source also included Villeroy's letter in cipher. The latter cipher turned out to be the same as one I previously reconstructed from BnF fr.15578 presented in "French Ciphers during the Reign of Henry IV of France".

Cipher between Emperor Charles V and Juan Perez (1527)

I added an unsolved cipher in a letter from Juan Perez, ambassador in Rome, to Charles V and another from Charles V to an unnamed recipient in "Ciphers during the Reign of Emperor Charles V" and added references to these in "Unsolved Historical Ciphers".

Venetian Ciphers with Superscripts

I uploaded a new article "Venetian Ciphers with Superscripts" about 16th-century Venetian ciphers. I added a reference to an unsolved cipher (1528) in "Unsolved Historical Ciphers".

Deciphered Letter to Emperor Charles V

In 2018, I solved a cipher in a letter (1529) to Emperor Charles V from Suarez de Figueroa, Spanish ambassador in Genoa and reported it in "Codebreaking of a Spanish Cipher with Vowel Indicators". Since I don't know Spanish, the deciphered text was no more than preliminary. Now, thanks to Demetrio Martín Vilela from Argentina, I made many corrections to my preliminary deciphering. I believe now it is almost a decent text in Spanish (though some parts are puzzling even for the native Speaker of modern Spanish). Martín even provided a quick English translation.