First a technological update - The code that drives this site is available for free on <a href="https://github.com/amacks/vatican_mss">GitHub</a>.  I've just merged in a rather complex change to create proper shelfmark sorting, fixing things like numbers-stored-as-strings and handling roman numerals.  Two problems yet unfixed are Fonds <strong>P.I.O</strong>, with the middle "I" reading as a roman numeral, and <strong>Arch.Cap.S.Pietro</strong> where sub-set "I" is read as roman 1 and everything gets confused.</p>...