Photo: Royal Commission for Riyadh City The chief executive of Saudi Arabia’s futuristic planned city Neom abruptly left his role, a major shake-up at the world’s biggest construction project.

Central to his proposal are “Freedom Cities,” which would be constructed on government-owned land. These futuristic urban ...

The project is split up into two parts: the Urban Tech Republic, where tons of startups will work on eco-friendly technologies for the cities of the future, and the Schumacher Quartier ...