Ka'aba

The Quran states that the Kaaba was constructed by Abraham (Ibrahim in Arabic), and his son Ishmael (Ismail in Arabic), after the latter had settled in Arabia.

The building has a mosque built around it, the Masjid al-Haram. All Muslims around the world face the Kaaba during prayers, no matter where they are. From any given point in the world, the direction facing the Kaaba is called the Qibla.