Look through images of Nancy Pelosi’s tenure as speaker of the House.

In her two decades leading House Democrats, Speaker Nancy Pelosi of California has been one of the most visible women in Washington. She was sworn in as the first woman to become speaker of the House in 2007, surrounded by the children of members of Congress. And over the years, Ms. Pelosi was often photographed as the lone woman in rooms full of men, until the ranks of Congress became more diverse.

Throughout her career, Republicans have vilified her, making her one the most threatened members of Congress. During President Donald J. Trump’s administration, their interactions sometimes drew attention, including when Ms. Pelosi aimed her applause at him at one State of the Union address and when she ripped up a copy of his remarks at another.

Here are some enduring images of Ms. Pelosi during her speakership.