What are the cornerstones of the Kaaba?

The Holy Kaaba is square-shaped, and its sides are known as "the two Shamis" (Syrian sides) and "the two Yamanis" (Yemeni sides). The corner next to the Kaaba's door is called the Black Stone corner (Al-Rukn Al-Aswad). It and the Yemeni corner (Al-Rukn Al-Yamani) are together referred to as "the two Yemeni corners." As for the other two corners, they are called "the two Shami corners," and they are located after the Hijr (towards Sham and the Maghrib). Thus, it becomes clear that the Kaaba has four corners.