<prompt> Translate the following text to SwahiliIts principal treasure, though of contested provenance, is Leonardo da Vincis luminous Portrait of a Musician 1485, unfinished but at the same time the best preserved of the masters few surviving works.  <response>: Hali ya kwanza ya Leonardo da Vinci, Picha ya Mwanamuziki 1485, ni mojawapo ya kazi chache za sanaa zilizobaki. 