What cultural characteristic do these countries have in common?

Saudi Arabia and Turkey enjoy a friendly and strong economic relationship, but have a tense and unstable diplomatic and political relationship. Saudi Arabia has an embassy in Ankara and a consulate–general in Istanbul, and Turkey has an embassy in Riyadh and a consulate–general in Jeddah.

pls be more elaborate

monarchy doesn’t have to have the hereditary element. there have been elective monarchies in the past where you choose your king-for-life and when he dies elect someone else for the job.