This is a schismatic monastery.
Mount Athos belongs to the Ecumenical Patriarchate. The monastery Esfigmenou, however, doesn't commemorate the patriarch, because he follows the new calendar. The monks of Esfigmenou are schismatic old-calendarists of the group of the "Archbishop of Athens" Chysostomos II.
In this monastery which is one of the biggest monasteries of Mount Athos there are five miracle-working icons of Panagia.
It's a small monastery, but there are wonderful wall paintings in the church (by Theofanes the Cretan).