As noted above much of the older treasures of the monastery were lost in the fires of 1761 and the warfare of 1821. Those treasures that the monastery now holds are kept in the katholikon. These treasures include [[icon]]s of the Virgin Galatotrophousa and Virgin Pantanassa, [[relics]] of [[saint]]s (the relics of St, Gregory were believed taken by some Serbian monks), and various [[liturgical objects]].
The monastery library holds 297 manuscripts, many other documents, and some 4,000 books. These include the only existing manuscript copy of the
‘'Shepherd of Hermas'' a work that dates back to the first century.