Since then, artists from Rembrandt to Frida Kahlo have made self-portraiture a central theme of their work. “The artists themselves dictate the terms on which we are invited to judge them,” writes artist Liz Rideal about the genre in the newly updated edition of the Phaidon tome 500 Self-Portraits. “These are visual autobiographical statements that reflect their times.” Here, we trace the practices of 10 great masters of the self-portrait.