We have just added a link to the Soprintendenza Archivistica e Bibliografica della Puglia e della Basilicata to the DMMapp.
The website is super-interesting: unlike the vast majority of the links in the DMMapp, this is full of charters!
Accessing them is a bit complex and it involves quite some clicks, but the content is amazing.
The homepage looks like this:

Choose one of the items you are interested in. We’ll go for charters from ecclesiastical entities (“Fondi pergamenacei di enti ecclesiastici”)
A list of locations open. Pick one.
We’ll go for the charters from the Basilica Pontificia di San Nicola.
Now, to get access to the charters, scroll all the way at the bottom until you see the sub-sections:
Now chose a period. We’ll go for the Normans!
Click on “List”, and the list of digitized items appears!
Give a loot at A_12! There’s an amazing seal to go with it:
Have fun exploring!
Giulio Menna
Giulio is a passionate lover of medieval manuscripts, with a particular interest in those from Southern Italy. He holds an MA in Book and Digital Media Studies and a BA in Graphic and Multimedia Design. Currently working as an application manager and developer at Leiden University Libraries, Giulio has developed the DMMapp and the DMMapp blog, which provides access to digitized medieval manuscripts and insightful commentary on these cultural treasures.