The Dutch painter Barend Graat lived his entire life in Amsterdam and worked as an artist from 1645 until 1709. He produced drawings and paintings, well over a hundred of which are currently known. He was trained by his uncle Hand Bodt as a landscape and animal painter but developed and a genre and historic painter as well. Also he produced many portraits of wealthy Amsterdam merchants (mostly) and their families. This monograph consist of five chapters and a catalogue raisoné. Six appendices contain all relevant documents with regards to Graats life and work. The first three chapters discuss the life and work of the artist. Chapters 4 and 5 present his oeuvre and etchings. The catalogue raisoné presents all known artworks in the form of paintings, drawings and etchings. TEXT IN DUTCH