yes there is something holding the pyramids together. the substance or thing that is holding the pyramids together is mud or cement.
They thought it was a god and they should prays it and it was the guard of the pyramids.
The Pyramid of Menkaura- 213 feetThe Pyramid of Khaefra- 471 feetThe Great Pyramid of Khufu- 481 feetThe pyramid of Khaefre looks taller because it is built on higher ground!
Although the great sphinx does not guard them the three pyramids close by are the Great Pyramid of Khufu, the Pyramid of Khafre and the Pyramid of Menkaure.
Yes because pharaoh Khafre (2520-2494B.C.E.) carved it to guard his tomb.