Cat. xvii. 13.  Epiphanius (De Mensuris et Ponder. c. 14):  “And he (Hadrian) found the city all levelled to the ground, except a few houses, and the Church of God which was small:  where the Disciples, on their return after the Saviour was taken up from the Mount of Olives, went up into the upper chamber:  for there it had been built, that is on Sion.”  Cf. Stanley, Sinai and Palestine, c. xiv. 3:  “Within the precincts of that Mosque (of the Tomb of David) is a vaulted Gothic chamber, which contains within its four walls a greater confluence of traditions than any other place of like dimensions in Palestine.  It is startling to hear that this is the scene of the Last Supper, of the meeting after the Resurrection, of the miracle of Pentecost, of the residence and death of the Virgin, of the burial of Stephen.”