Pierre Jean Louis Ovide Doublet was a person who lived a long time ago, back in the 1800s. He was a scientist who studied animals and plants in something called a museum.
Now, a museum is like a big building where people can go to see cool things that other people have found or made in the past. In this particular museum, Pierre took care of animals and plants and made sure they were okay.
Pierre was really good at his job and people really liked him because he was always learning new things and discovering new animals and plants. He even wrote a book about all the cool things he found in the museum.
People still remember Pierre today because he was so good at his job and helped us learn more about the world we live in.