A plumb bob, line and square (Predecessor to the spirit level) from the tomb of Sennedjem, an artisan working on the tombs in the valley of the kings. Egypt, 19th Dynasty. ~1250 BC. [811x561]

Source: https://reddit.com/r/ArtefactPorn/comments/8w0iai/a_plumb_bob_line_and_square_predecessor_to_the/