Kufu's pyramid was actively used. It's the only likely reason for the design of it's portcullis, which doesn't defend as well against entry as previous designs

Kufu's pyramid was actively used. It's the only likely reason for the design of it's portcullis, which doesn't defend as well against entry as previous designs, and is equipped for repeated opening. Plenty of information on the topic here: https://www.youtube.com/watch?v=ItAQSrlG9WQ https://www.youtube.com/watch?v=ItAQSrlG9WQ https://www.youtube.com/watch?v=r5Qe7xDf_ks https://www.youtube.com/watch?v=r5Qe7xDf_ks