<prompt> Translate the following text to EnglishMlango wa kwanza upande wa kushoto ni moja tu iliyopambwa na mosaiki ya asili ya karne ya 13, inayoonyesha Uhamisho wa Mwili wa Mtakatifu Marko, uliosafirishwa kwa magendo kutoka Alexandria, Misri.  <response>: The first portal on the left is the only one decorated with an original 13th-century mosaic, depicting the Transfer of St. Marks Body, smuggled out of Alexandria, Egypt. 