Mads Alstrup (1808-1876) was the first Danish portrait photographer with his own studio. For 16 years, he produced an enormous number of daguerreotypes, in Copenhagen and the provinces, before his business suffered from the financial crisis of 1857. He moved to Sweden in 1858 and continued to take portraits there for the remainder of his life. He is considered to be one of Denmark's pioneers in the practice of photography.