The primary link to all Syriac manuscripts online
The most important groups you can find on the first link
- Vatican manuscripts: http://www.mss.vatlib.it/guii/scan/link1.jsp?fond=Vat.sir
- Manuscripts of St. Catherine’s Monastery: https://www.loc.gov/collections/manuscripts-in-st-catherines-monastery-mount-sinai/
- Manuscripts of St. Catherine’s Monastery One thousand manuscripts in Greek, three hundred in Arabic, one hundred and fifty in Syriac and the rest in other languages with full data about them
https://www.loc.gov/collections/manuscripts-in-st-catherines-monastery-mount-sinai/
To view the catalogs of Syriac manuscripts and where to download them online
Manuscripts preserved in the monasteries and churches of the Middle East
The Manganah Manuscripts in Birmingham, UK
Syriac and Arabic manuscripts uploaded to the archive website (filter the search in the left menu for manuscripts from St. Mark's Monastery - Jerusalem, St. Thomas Church - Mosul, etc.)
Syriac manuscripts at the Bibliothèque Nationale in Paris
French website describes Syriac manuscripts in Paris, Florence, Sharafa and more