<prompt> Translate the following text to SwahiliOn what was once a Celtic burial ground originally named Mont-Tombe, the bishop of the nearby town of Avranches began by building an oratory in the eighth century at the prompting, he claimed, of the Archangel Michael.  <response>: Katika eneo ambalo wakati mmoja lilikuwa kaburi la Waselti lilokuwa limeitwa Mont-Tombe, askofu wa mji wa karibu wa Avranches alianza kujenga oratory katika karne ya nanekwa kuchochewa, alidai, na Malaika Mkuu Mikaeli. 