Discuss developments in secular music and dance brought about by the italian courts of the fifthteenth century

In view of Leonello’s serious preparation as an amateur musician, standards for secular music were probably higher at Ferrara than at many rival Italian courts of the time. During Leonello’s ten-year rule, the main groups of secular musicians at the court were established. The groups remained essentially the same to the end of the century. To specialists, it is a commonplace that under Leonello and throughout the second half of the fifteenth century, Ferrara became a principal center for Italian court dance. This development of dance has not been seen within the context of Ferrarese court...

relief sculpture - images are set against a flat background.

a coin is a good example: the inscription, the date, and the figure are slightly raised above a flat surface. the ancient egyptians sometimes carved figures into a flat surface.  

pro: they take significantly less time to make and do not require as much tools or skills as free-standing

cons: not nearly as realistic, as it is not fully 3-d, and does not have the details that a free-standing one does.

freestanding sculptures (also called  carved in the round) are not attached to any  background.   they are 3-dimensional  and fully rendered.