Franz Regis Clet was a French Catholic priest and missionary belonging to the Congregation of the Mission. Born in Grenoble in 1748, he later served in Paris and Annecy before volunteering for missionary work in China. After arriving in Macao, he worked extensively in provinces such as Jiangxi and Huguang. His efforts to spread the faith in East Asia eventually led to his arrest in 1819. He was executed in Wuchang in 1820, becoming one of the martyrs of China.