How long did charlemagne’s empire have an influence on europe? for decades, until charlemagne’s death until the catholic church lost power for more than eight hundred years for at least one hundred years after charlemagne’s death as part of the magna carta, england’s parliament had the power to approve or reject the king’s proposals. pass legislation so long as the king approved it. choose a new king if it was dissatisfied with the monarch’s actions. pass legislation even if the king did not like it.