St. Benet's abbey yes? I have just checked some photos of this place and it looks really interesting! The miss is quite monumental and dominates the medieval structure, how curious - thank you for letting me know about this place. You are right that there was a building attached to St. Theodore. Today, Mistra is a ruined city and there are only few structures surviving there other than churches. Only one, little monastery, is still inhabited.... Thank you once again, for taking the time to view and comment, I really appreciate reading comments from you, thanks again!