Question: will there be a season 4 of da vinci's demons

Answer: No, The series premiered in the United States on Starz on 12 April 2013, and its second season premiered on 22 March 2014. The series was renewed for a third season, which premiered on 24 October 2015. On 23 July 2015, Starz announced that the third season would be the show's last. However Goyer has left it open for a miniseries return.