USS Atlanta was a protected cruiser and one of the first steel warships of the "New Navy" of the 1880s. In some references she is combined with Boston as the Atlanta class, in others as the Boston class.
USS Atlanta in 1891
6 inch (152 mm) gun on Atlanta.
The forecastle and 8 inch gun on Atlanta
Protected cruisers, a type of cruising warship of the late-19th century, gained their description because an armoured deck offered protection for vital machine-spaces from fragments caused by shells exploding above them. Protected cruisers resembled armored cruisers, which had in addition a belt of armour along the sides.
The Russian protected cruiser Oleg was a Bogatyr-class protected cruiser
The protected cruiser Esmeralda, built by the shipyard of the Armstrong House for the Chilean Navy, was the first warship of its kind in the world.
Hertha on a visit to the United States in 1909
Dutch protected cruiser Noord-Brabant as an accommodation ship