Giovanni Baglione (c.1566-1643) was one of the most successful painters in seventeenth-century Rome. Now he is among the most despised artists of all time. In 1603 he was the target of scurrilous verses circulated around Rome and, in response, Baglione brought a legendary lawsuit against Caravaggio and other artists. This book seeks to redress this antagonistic position and to view his life, as a painter, draftsman and writer. O'Neil explores Baglione's world through primary sources, including documents on apprenticeships, workshop arrangements, and collaborations. O'Neil also provides the first diplomatic transcription in English of the court libel documents. What emerges is not only a realistic view of Baglione and his contribution to the history of art, but also an illuminating glimpse into the world of the Roman Baroque. The book contains color plates, over 100 black-and-white pictures, and a checklist of paintings, drawings and documents.