Charles issued a number of charters for West Frankish recipients during his stay in Paris during and after the siege. He recognised rights and privileges granted by his predecessors to recipients in the Spanish March and Provence, but especially in Neustria, where he had contact with Nantes at a time when the Breton duke Alan I was known to be powerful in the county of Nantes. It is probable that Charles granted Alan the right to be titled "rex"; as emperor he would have had that prerogative and Alan's use of the title appears legitimate. A charter dated to between 897 and 900 makes reference to the soul of "Karolus", on whose behalf Alan had ordered prayers to be said in the monastery of Redon. This was probably Charles the Fat.