The Dutch artist Jan Lievens (1607-1674) was viewed by his contemporaries as one of the most important artists of his age. Ambitious and self-confident, Lievens assimilated leading trends from Haarlem, Utrecht and Antwerp into a bold and monumental style that he refined during the late 1620s through close artistic interaction with Rembrandt van Rijn in Leiden, climaxing in a competition for a court commission. Lievens's early Job on the Dung Heap and Raising of Lazarus demonstrate his careful adaptation of style and iconography to both theological and political conditions of his time. This much-discussed phase of Lievens's life came to an end in 1631when Rembrandt left Leiden. Around 1631-1632 Lievens was transformed by his encounter with Anthony van Dyck, and his ambition to be a court artist led him to follow Van Dyck to London in the spring of 1632. His output of independent works in London was modest and entirely connected to Van Dyck and the English court, thus Lievens almost certainly worked in Van Dyck's studio. In 1635, Lievens moved to Antwerp and returned to history painting, executing commissions for the Jesuits, and he also broadened his artistic vocabulary by mastering woodcut prints and landscape paintings. After a short and successful stay in Leiden in 1639, Lievens moved to Amsterdam permanently in 1644, and from 1648 until the end of his career was engaged in a string of important and prestigious civic and princely commissions in which he continued to demonstrate his aptitude for adapting to and assimilating the most current style of his day to his own somber monumentality. Lievens's roving and acquisitive character expressed itself in his dynamic Flemish-style landscape drawings after 1660. These much-vaunted works have drawn attention away from how Lievens systematically fulfilled his ambitions as a history painter. This dissertation seeks to address the imbalanced view of Lievens's later career by examining his character and ambitions and success in light of the language his early patrons and biographers used to discuss his talent and self-confidence.