Harriet Goodhue Hosmer (October 9, 1830 – February 21, 1908) was a neoclassical sculptor, considered the most distinguished female sculptor in America during the 19th century. She is known as the first female professional sculptor. Among other technical innovations, she pioneered a process for turning limestone into marble. Hosmer once lived in an expatriate colony in Rome, befriending many prominent writers and artists. She was a cousin of poet William H. C. Hosmer and tragic actress Jean Hosmer.