The Treaty of Verdun of 843 is (or used to be) famous, as the moment when the Frankish empire of Charlemagne was divided amongst his heirs. It can be argued that this division can still be traced in modern European political borders.
But at the time, the treaty was seen as no more than provisional. And one of the most spectacular attempts to reverse it was the invasion of western Francia by the eastern Frankish king, Louis ‘the German’, in 858. In the end the western king, Charles ‘the Bald’, managed to hold on to power – but it appears to have been a close-run thing, and in the winter of 858 the whole political framework of the Frankish world teetered in the balance.
One of the reasons Charles clung on was that his northern Frankish bishops did not desert him (though Archbishop Wenilo of Sens made a different decision). Instead, the northern bishops met at the royal palace of Quierzy from where they sent a remarkable and wide-ranging letter to the invader Louis, in which they offered him advice on what his priorities should be as a king. Managing royal lands, tackling the Vikings, supporting the church – all these ought to be higher up his agenda than taking over his own brother’s kingdom. Above all, he should be wary of listening too much to (secular) counsellors who might not have his best (spiritual) interests at heart.
Here’s a translation of this source as a pdf (it’s also available on the Hincmar translation website, since Archbishop Hincmar of Reims was its leading author). It’s the first result of a regular collaborative Latin translation class with PhD students (Harry Mawdsley, Richard Gilbert, and Robert Heffron) at the Department of History here in Sheffield. We hope it’s useful.
Image: adapted from Wikipedia.