If one looks at the monarchies established in the Balkan states following autonomy or independence from the Ottoman Empire, only Serbia ended up with a native dynasty on the throne, and though there was competition for the throne there, it was between Serbian houses. Why wasn't this the case in Bulgaria, Greece, or (ultimately) Romania, or for Albania in the twentieth century? Each of them (sans perhaps Bulgaria) had possible local potentates, and I know of no reason why Cuza could not have been succeeded by a local dynasty in Romania. Thoughts?