And when they had platted a crown of
thorns, they put it upon
his head, and a reed in his right hand;
Matthew 27:29

Thorn bushes grow abundantly in the
Jerusalem environs. 
The monks of St Cathrine Monastery in Sinai are pointing out a thorn bush growing east of the large
Mastery wall
The crown of Thorns has been sactified in the
Church of the Holy Sepulchre.
Jerusalem Christianity -  Hand Made