Interior of the Dome of the Rock, Jerusalem
Four pillars encircling the sacred rock (al-Sakhra) and four arcades
with four continuous arches between them support the dome.
(Photo from Henri Stierlin "Architecture de l'Islam" 1979)

REFERENCE for comparison
Looking down the current interior of the Rotunda of the Church of
the Holy Sepulchre, Jerusalem (From National Geographic's Web Site)