Which artist is known for his extensive self-portraiture during the 17th century?

The artist known for his extensive self-portraiture during the 17th century is Rembrandt van Rijn. Throughout his career, Rembrandt created numerous self-portraits that captured not only his physical likeness but also conveyed deep insights into his psychological states and his evolving artistic style. These self-portraits are significant because they provide a unique glimpse into the artist's life, personality, and the societal context of his time. They also showcase his mastery of light, shadow, and texture, which are hallmarks of his painting style.

Rembrandt's self-portraits form a critical part of his body of work, allowing viewers to engage with him on a personal level and observe his growth and change as an artist across different periods of his life. This body of work is unmatched when compared to contemporaries, making him a standout figure in the realm of self-portraiture of the 17th century.