What historical regions does the city where MA'ADEN's corporate headquarters are located belong to?
Riyadh Riyadh (/rɨˈjɑːd/; Arabic: الرياض‎ ‎ "ar-Riyāḍ" ] ) is the capital and most populous city of Saudi Arabia. It is also the capital of Riyadh Province and belongs to the historical regions of Najd and Al-Yamama. It is situated in the center of the Arabian Peninsula on a large plateau and home to more than six million people.
North Yemen North Yemen is the geographic area named the Yemen Arab Republic (1962–1990), its predecessor, the Mutawakkilite Kingdom of Yemen (1918–1962), and their predecessors that exercised sovereignty over the territory that is now the north-western part of the state of Yemen in southern Arabia.