He completed his doctorate in 1996 at Portland State University in Oregon. He is also an architect, urban planner and historian and has authored numerous books and articles focusing on early Islamic history and civilization with a particular focus on the Hijaz. Al Kadi has been praised internationally for his groundbreaking research on the various travel routes by the Prophet Mohammed (ﷺ) and his Companions. His groundbreaking books “Makkah to Medina: A Photographic Journey of the Hijrah Route” and “Milestones of Arabia” are widely considered as