What painter who was a collector of animal specimens fossils and skeletal remains painted a self portrait on his museum in 1822?

The painter you are referring to is Charles Willson Peale. He was not only an accomplished artist but also a naturalist and a collector of various specimens, including animal fossils and skeletal remains. In 1822, he painted a self-portrait that prominently featured him in his museum, which housed his extensive collection of natural history artifacts. Peale's contributions to both art and science were significant during his lifetime.