Byzantine mosaic on the floor of the cathedral

And they also say that it was here just in this cathedral, that the cunning Genoese got a bowl of amazing beauty from a single piece of emerald. That bowl was declared as the Holy Grail - the bowl from which Christ drank during the Last Supper and into which Joseph collected blood from His wounds. That Joseph was the elder of the Jewish community in Jerusalem on the territory of which the very mountain Golgotha ​​was located.