The Giza Pyramid is an observatory

Theory its an observatory Its why the giza pyramid is so bland and industrual like compared to the other pyramids and why small holes in the pyramid point to certain stars

Since they didn't have the machining yet to make glass lens they used mirrors and a system of pulleys the ligth from in coming stars would be projected onto the internal chamber walls

The pyramid shape serves as a sun shield like that of the james web telescope which would allow view of distant stars anytime of the day rather then just on dark nigths .

The sandstone casing would also help reflect any other ambient ligth sources which reduce glare and giving a better image quality .