Many of the Prophet's Companions travelled to worship at the blessed spot to which Muhammad was brought by night and from which he ascended through the heavens. According to the tradition of the Prophet, travel for the sake of worship is undertaken to only three mosques; the Sacred Mosque in Mecca, the Prophet's Mosque in Medina, and the Furthest Mosque in Jerusalem. Essentially unchanged for more than thirteen centuries, the Dome of the Rock remains one of the world's most beautiful and enduring architectural treasures. The gold dome stretches 20 metres across the Noble Rock, rising to an apex more than 35 metres above it. The Qur'anic verse 'Ya Sin' is inscribed across the top in the dazzling tile work commissioned in the 16th century by Suleiman the Magnificent. These Mosque of the Rock muslim crystal gifts are 4 x 4 x 2.5 inches.