The largest piece of Holy Wood in the world is located today in the Holy Monastery of Xiropotamos on Mount Athos.
It is the first monastery that the pilgrim encounters heading from the port of Daphne to Karyes.
This is reliquary number 289. In the same Holy Monastery, Tradition says that Rigas Velestinlis served as a probationary Monk for about six months!
Source: dimitrislikoudis.blogspot.com