Portrait of Lieutenant-General Frederik Knotzer c. 1832

"Portrait of Lieutenant-General Frederik Knotzer" is an oil on canvas portrait by Dutch painter Jan Willem Pieneman, dating to circa 1832. The painting depicts a close-up view of the titular Knotzer, a Dutch military officer, wearing a dark military uniform with gold trim and decorations, his gaze directed slightly to the right of the viewer. It is located in the Rijksmuseum, Amsterdam, and demonstrates Pieneman's skill in portraiture and his ability to capture the character of his subject. The painting is a notable example of the Dutch Romantic style of portraiture, which emphasized realism and detail, and is often considered one of Pieneman's finest works.