RIYADH: Relics hidden beneath the remains of Ghasiba reveal a once 32,000 square meter-wide fortress that guarded the first known rule of the Al-Saud royal family. Not many people know that Ghasiba District, founded in 1446, was the ruling center of the Al-Saud family for more than 300 years, even before the UNESCO World Heritage site of At-Turaif in Diriyah was established as