The following excerpt is from an article at the Estonian Public Broadcasting website.
A project to digitize the oldest parchment documents in the country is now complete.
The State Archives, Tallinn City Archive and History Museum led the effort, which started in 2010.
The documents contain information valuable to studying the history of settlement and agriculture in medieval and post-Renaissance Estonia as well as political, military and cultural history, said the institutions.
The oldest written historical sources are on parchment and date from the 13th century, the oldest one of all from 1237: in it, papal legate William of Modena communicates a decree from Holy Roman Emperor Frederick II regarding donations to the church. The original document is in the the Tallinn City Archive’s magistrate’s collection.
…
The digitized parchment documents are available for public use at http://www.ra.ee/pargamendid/