Porter's original casemate ironclad (co-)design, which he based on his two 150 ft. and 180 ft. standard designs. The Columbia class was a variant of the latter and . Both were built with larger and differently shaped casemates. See also List of United States Navy ships List of ships of the Confederate States Navy Bibliography of American Civil War naval history Union Navy Confederate States Navy Notes Abbreviations used in these notes: ORA (Official records, armies): War of the Rebellion: a compilation of the official records of the Union and Confederate Armies. ORN (Official records, navies): Official records of the Union and Confederate Navies in the War of the Rebellion. References (translation by Paolo E. Coletta of Marina del Sud: storia della marina confederate nella Guerra Civile Americana, 1861–1865. Rizzoli, 1993.) Quarstein, John V., C.S.S. Virginia, Mistress of Hampton Roads, self-published for the Virginia Civil War Battles and Leaders Series; 2000. External links A record of events in Norfolk County, Virginia, online text with an entire chapter on the battle. Civil War Naval History USS Monitor National Historical Site – Its 'revolutionary' gun turret has been raised from the ocean floor. On-line exhibition of the Monitor An original 1862 Chicago Tribune Article Battle of Hampton Road website First Edition Report on the Battle of the Monitor and Merrimac Newspaper coverage of the Battle of Hampton Roads CWSAC Report Update 1862 in Virginia Peninsula campaign Battles of the Eastern Theater of the American Civil War Naval battles of the American Civil War Battles of the American Civil War in Virginia Inconclusive battles of the American Civil War 1862 in the American Civil War Riverine warfare March 1862 events