How’d they get up? Don’t know the place but it looks like the back side might be a gentler slope. Building stone works like this always requires first building scaffolding. That’s arranged with easy steps, slopes and lift capability. If you watched any of the Notre Dame repairs you saw industrial grade scaffolding. Clear to the top of the new spire which, as I recall, is topped with a chicken. Climbing that scaffolding kind of inspires “chicken skin” in most folks.
the medieval custom was to put a rooster on the top of a church spire (not a chicken). Lots of different symbolism: refers to France, refers to Peter’s denial of Christ, and refers to the rooster crowing at the coming of the dawn, in this case the resurrection of Jesus.
Fantasy art.