For example , he organised a meeting between six of the prince - electors promulgating the constitutional Declaration of Rhense in 1338 .
From then on , he acted as mediator in the ongoing disputes between various princes , which allowed him to build up useful connections .
He organised a meeting between six of the prince - electors promulgating the constitutional Declaration of Rhense in 1338 .
From then on , he acted as mediator in the ongoing disputes between various princes , which allowed him to build up useful connections .