ART

A monument to Louis J.M. Daguerre, the Frenchman who discovered the earliest practical system of photography, the daguerreotype, has been unveiled outside the Smithsonian Institution’s National Portrait Gallery and National Museum of American Art. The 12-foot-high, 23-ton granite-and-bronze monument was originally presented to the American people in 1890 by the Professional Photographers of America, which is sponsoring in part the relocation and rededication in honor of the 150th anniversary of the invention of photography.