Three great masters–Leonardo da Vinci, Michelangelo and Raphael–dominated the period known as the High Renaissance, which lasted roughly from the early 1490s until the sack of Rome by the troops of the Holy Roman Emperor Charles V of Spain in 1527.
your speech must be organize. From introduction to conlusion. It is informative so you must choose topic that is beneficial and where your audience can gain knowledge. Avoid fillers and you must have an eye to eye contact with the audience. Lastly, be confident.
Answer: It's probably important to have realistic interpretation because then the artist's audience can actually relate to it.
The role of the artist has change ( if any) may have been the fact that now not only do they speak for themselves, their art now expresses other people's feelings too that can not express on their own.