The second USS Pennsylvania (ACR-4), also referred to "Armored Cruiser No. 4", and later renamed Pittsburgh and numbered CA-4, was a United States Navy armored cruiser, the lead ship of her class.
USS Pennsylvania (CA-4)
USS Pittsburgh (CA-4)
The first airplane landing on a ship - Eugene Ely landing on USS Pennsylvania
USS Pennsylvania in Drydock Dewey at Olongapo, Philippines