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View of the remains of a first century house that is preserved in the lower level of the Convent. Ken Dark believes that this might be the house in which Jesus grew up (see below)!
The east side [on right side of image] of the structure originally had rock built walls, as this part of the house was built away from the naturally occurring rock cave. The visible wall was rebuilt in the Crusader period but may incorporate remains of the first–century A.D. wall. (Dark, p. 56)
Dark, Ken. “Has Jesus' Nazareth House Been Found?” Biblical Archaeological Review 41, no. 2 (March/April 2015): 54–63, 72.