Fifty years ago, some 100,000 people flocked to San Francisco’s Haight-Ashbury district to join the countercultural currents of the Summer of Love. Now the city’s de Young Museum is displaying more than 400 artifacts from the era in “The Summer of Love Experience.” The show includes quotes from luminaries of the day, such as the anthropologist Margaret Mead, who said, “Never doubt that a small group of thoughtful, committed citizens can change the world; indeed, it’s the only thing that ever has.”

Read more: The Summer of Love: A Walking Tour of San Francisco, 50 Years Later