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     6 years ago 

    Thanks!

    Those holes are called Putlog holes or putlock holes.

    From wikipedia (source):

    Putlog holes or putlock holes are small holes made in the walls of structures to receive the ends of poles (small round logs) or beams, called putlogs or putlocks, to support a scaffolding. Putlog holes may extend through a wall to provide staging on both sides of the wall.

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