Back in the seventies they didn’t much care for those sorts of… pesky details for archeology nerds.

When the Mexican government - tourism or culture departments, or even if federal or state level, I’m not sure - mounted a permanent evening light show at Teotihuacán. They “tidied up” the place, filling in holes and pockets in the pyramids with cement, they drilled into them to run up the wiring and mounting the light stands, etc.

They basically committed every contemporary sacrilege except using dynamite.