<prompt> Translate the following text to SwahiliTheir subtlety of colour, liveliness of posture, and strong, lifelike faces record a last remarkable flowering of Byzantine art before its descent into decadence.  <response>: Rangi zao nyembamba, umbo lao lenye kuvutia, na nyuso zao zenye nguvu na zenye kuonekana kuwa halisi, zinaonyesha kwamba sanaa ya Byzantium ilifanikiwa sana kabla ya kuharibika. 